diff --git a/img/LICENSES.md b/img/LICENSES.md
new file mode 100644
index 0000000000..a1d7cc9afd
--- /dev/null
+++ b/img/LICENSES.md
@@ -0,0 +1,41 @@
+# Licenses
+## mail.svg
+- Created by: Google
+- License: Apache License, Version 2.0
+- Link: https://fonts.google.com/icons?selected=Material%20Icons%3Aemail%3A
+
+## favicon-mask.svg
+- Created by: Google
+- License: Apache License, Version 2.0
+- Link: https://fonts.google.com/icons?selected=Material%20Icons%3Amark_email_unread%3A
+
+## favicon-notification.png
+- Created by: Google
+- License: Apache License, Version 2.0
+- Link: https://fonts.google.com/icons?selected=Material%20Icons%3Amark_email_unread%3A
+
+## favicon-notification.svg
+- Created by: Google
+- License: Apache License, Version 2.0
+- Link: https://fonts.google.com/icons?selected=Material%20Icons%3Amark_email_unread%3A
+
+## favicon-touch-notification.svg
+- Created by: Google
+- License: Apache License, Version 2.0
+- Link: https://fonts.google.com/icons?selected=Material%20Icons%3Amark_email_unread%3A
+
+## favicon-touch.svg
+- Created by: Google
+- License: Apache License, Version 2.0
+- Link: https://fonts.google.com/icons?selected=Material%20Icons%3Aemail%3A
+
+## favicon.svg
+- Created by: Google
+- License: Apache License, Version 2.0
+- https://fonts.google.com/icons?selected=Material%20Icons%3Aemail%3A
+
+## mail-notification.svg
+- Created by: Google
+- License: Apache License, Version 2.0
+- Link: https://fonts.google.com/icons?selected=Material%20Icons%3Aemail%3A
+
diff --git a/img/archive.png b/img/archive.png
deleted file mode 100644
index 1c1e69d6f7..0000000000
Binary files a/img/archive.png and /dev/null differ
diff --git a/img/archive.svg b/img/archive.svg
deleted file mode 100644
index 27427ba7e0..0000000000
--- a/img/archive.svg
+++ /dev/null
@@ -1,4 +0,0 @@
-<?xml version="1.0" encoding="UTF-8" standalone="no"?>
-<svg xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns="http://www.w3.org/2000/svg" height="16" width="16" version="1.1" xmlns:cc="http://creativecommons.org/ns#" xmlns:dc="http://purl.org/dc/elements/1.1/">
- <path d="m4 2-4 6v5h16v-5l-4-6h-8zm1 1h6l3 5h-4v3h-4v-3h-4l3-5z"/>
-</svg>
diff --git a/img/drafts.png b/img/drafts.png
deleted file mode 100644
index 95f3500bc1..0000000000
Binary files a/img/drafts.png and /dev/null differ
diff --git a/img/drafts.svg b/img/drafts.svg
deleted file mode 100644
index 5bffdad560..0000000000
--- a/img/drafts.svg
+++ /dev/null
@@ -1,6 +0,0 @@
-<?xml version="1.0" encoding="UTF-8" standalone="no"?>
-<svg xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns="http://www.w3.org/2000/svg" height="16" width="16" version="1.1" xmlns:cc="http://creativecommons.org/ns#" xmlns:dc="http://purl.org/dc/elements/1.1/">
- <g transform="translate(0 -1036.4)">
-  <path style="" d="m12.594 1.3438c-0.532-0.0313-1.094 0.1562-1.594 0.6562l3 3c1.5-1.5 0.188-3.5625-1.406-3.6562zm-2.594 1.6562l-7 7-2 5 5-2 7-7-3-3zm-6.5 7.5l2 2-2.5 1.5-1-1 1.5-2.5z" transform="translate(0 1036.4)"/>
- </g>
-</svg>
diff --git a/img/favicon-mask.svg b/img/favicon-mask.svg
index a793d693ea..76076abfcc 100644
--- a/img/favicon-mask.svg
+++ b/img/favicon-mask.svg
@@ -1,2 +1 @@
-<?xml version="1.0" encoding="UTF-8" standalone="no"?>
-<svg xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns="http://www.w3.org/2000/svg" enable-background="new 0 0 595.275 311.111" xml:space="preserve" height="16" width="16" version="1.1" y="0px" x="0px" xmlns:cc="http://creativecommons.org/ns#" xmlns:dc="http://purl.org/dc/elements/1.1/" viewBox="0 0 16 16"><path d="m2.5-0.000002c-1.385 0-2.5 1.115-2.5 2.5v11c0 1.385 1.115 2.5 2.5 2.5h11c1.385 0 2.5-1.115 2.5-2.5v-11c0-1.385-1.115-2.5-2.5-2.5h-11zm-0.72266 3.75h12.444c0.431 0 0.77832 0.34727 0.77832 0.77832v7.1943c0 0.431-0.34732 0.77734-0.77832 0.77734h-12.444c-0.4306 0-0.777-0.346-0.777-0.777v-7.1947c0-0.4308 0.3464-0.7783 0.7773-0.7783zm0.6563 0.8994-0.5342 0.5352 3.209 3.2324l-2.4307 2.4551 0.53418 0.55957 2.4551-2.4795 1.7744 1.7979h1.1172l1.7744-1.7988 2.4551 2.4551 0.53516-0.53418-2.4062-2.4551 3.1836-3.2324-0.53516-0.53516-5.3467 5.3232h-0.46191l-5.3232-5.3232z"/></svg>
+<svg width="16" height="16" enable-background="new 0 0 595.275 311.111" version="1.1" viewBox="0 0 16 16" xml:space="preserve" xmlns="http://www.w3.org/2000/svg"><path d="m2.5 0c-1.385 0-2.5 1.115-2.5 2.5v11c0 1.385 1.115 2.5 2.5 2.5h11c1.385 0 2.5-1.115 2.5-2.5v-11c0-1.385-1.115-2.5-2.5-2.5zm0.5 3h10c0.6875 0 1.25 0.5625 1.25 1.25v7.5c0 0.6875-0.5625 1.25-1.25 1.25h-10c-0.6875 0-1.25-0.5625-1.25-1.25l0.0059-7.5c-4.1e-5 -0.6875 0.5566-1.25 1.2441-1.25zm0 1.25v1.25l5 3.125 5-3.125v-1.25l-5 3.125z" stroke-width=".125"/></svg>
diff --git a/img/favicon-notification.png b/img/favicon-notification.png
index 72f87a46fe..7215a19322 100644
Binary files a/img/favicon-notification.png and b/img/favicon-notification.png differ
diff --git a/img/favicon-notification.svg b/img/favicon-notification.svg
index c7c83eddbd..6c9484b820 100644
--- a/img/favicon-notification.svg
+++ b/img/favicon-notification.svg
@@ -1,2 +1 @@
-<?xml version="1.0" encoding="UTF-8" standalone="no"?>
-<svg width="32" height="32" enable-background="new 0 0 595.275 311.111" version="1.1" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 32 32" xml:space="preserve" x="0px" y="0px"><rect width="32" height="32" x="0" rx="5" y="-.0000052588" fill="#0082c9" ry="5"/><path fill="#fff" d="m3.5556 7.4999c-0.8618 0-1.5556 0.6944-1.5556 1.5561v14.39c0 0.86188 0.69378 1.554 1.5556 1.554h24.888c0.862 0 1.556-0.692 1.556-1.554v-14.39c0-0.8621-0.694-1.5565-1.556-1.5565zm1.3125 1.7992 10.646 10.646h0.92366l10.694-10.646 1.0694 1.0694-6.3681 6.4653 4.8125 4.9097-1.0694 1.0694-4.9097-4.9097-3.5487 3.5972h-2.235l-3.548-3.596-4.9101 4.958-1.0695-1.119 4.8616-4.909-6.4171-6.4653z"/><path fill="#f00002" d="m30 7.0002a5 5 0 0 1 -10 0 5 5 0 1 1 10 0z"/></svg>
+<svg width="32" height="32" enable-background="new 0 0 595.275 311.111" version="1.1" viewBox="0 0 32 32" xml:space="preserve" xmlns="http://www.w3.org/2000/svg"><rect width="32" height="32" rx="5" ry="5" fill="#0082c9" stroke-width=".25"/><path d="m28.5 12.225v11.275c0 1.375-1.125 2.5-2.5 2.5h-20c-1.375 0-2.5-1.125-2.5-2.5v-15c0-1.375 1.125-2.5 2.5-2.5h12.625c-0.075 0.4-0.125 0.825-0.125 1.25 0 1.85 0.8125 3.4875 2.0875 4.6375l-4.5875 2.8625-10-6.25v2.5l10 6.25 6.625-4.15c0.675 0.25 1.375 0.4 2.125 0.4 1.4125 0 2.7-0.4875 3.75-1.275zm-7.5-4.975c0 2.075 1.675 3.75 3.75 3.75s3.75-1.675 3.75-3.75c0-2.075-1.675-3.75-3.75-3.75s-3.75 1.675-3.75 3.75z" fill="#fff" stroke-width="1.25"/></svg>
diff --git a/img/favicon-touch-notification.png b/img/favicon-touch-notification.png
index a7ba0bc4b6..a42119b6e6 100644
Binary files a/img/favicon-touch-notification.png and b/img/favicon-touch-notification.png differ
diff --git a/img/favicon-touch-notification.svg b/img/favicon-touch-notification.svg
index 5166b67ec0..6901ef6f7f 100644
--- a/img/favicon-touch-notification.svg
+++ b/img/favicon-touch-notification.svg
@@ -1,2 +1 @@
-<?xml version="1.0" encoding="UTF-8" standalone="no"?>
-<svg y="0px" x="0px" version="1.1" width="128" xmlns="http://www.w3.org/2000/svg" height="128" enable-background="new 0 0 595.275 311.111" viewBox="0 0 128 128" xml:space="preserve"><rect y="-.0000015" x="0" fill="#0082c9" width="128" height="128" rx="20" ry="20"/><path d="m14.222 29.999c-3.4472 0-6.2223 2.7773-6.2223 6.2244v57.561c0 3.4475 2.7751 6.216 6.2223 6.216h99.555c3.4475 0 6.223-2.7685 6.223-6.216v-57.56c0-3.4472-2.7755-6.2244-6.223-6.2244zm5.25 7.1967 42.585 42.585h3.6946l42.777-42.585 4.2778 4.2777-25.472 25.861 19.25 19.639-4.2777 4.2777-19.639-19.639-14.195 14.389h-8.9446l-14.193-14.385-19.64 19.831-4.2781-4.473 19.445-19.639-25.667-25.86z" fill="#fff"/><path d="m120 28.006a20 20 0 0 1 -40 0 20 20 0 1 1 40 0z" fill="#ff4402"/></svg>
+<svg width="128" height="128" enable-background="new 0 0 595.275 311.111" version="1.1" viewBox="0 0 128 128" xml:space="preserve" xmlns="http://www.w3.org/2000/svg"><rect width="128" height="128" rx="20" ry="20" fill="#0082c9"/><path d="m114 48.9v45.1c0 5.5-4.5 10-10 10h-80c-5.5 0-10-4.5-10-10v-60c0-5.5 4.5-10 10-10h50.5c-0.3 1.6-0.5 3.3-0.5 5 0 7.4 3.25 13.95 8.35 18.55l-18.35 11.45-40-25v10l40 25 26.5-16.6c2.7 1 5.5 1.6 8.5 1.6 5.65 0 10.8-1.95 15-5.1zm-30-19.9c0 8.3 6.7 15 15 15 8.3 0 15-6.7 15-15 0-8.3-6.7-15-15-15-8.3 0-15 6.7-15 15z" fill="#fff" stroke-width="5"/></svg>
diff --git a/img/favicon-touch.png b/img/favicon-touch.png
index 91132a107b..f7dad782a6 100644
Binary files a/img/favicon-touch.png and b/img/favicon-touch.png differ
diff --git a/img/favicon-touch.svg b/img/favicon-touch.svg
index fe4b8ebfc5..2824fa0cdb 100644
--- a/img/favicon-touch.svg
+++ b/img/favicon-touch.svg
@@ -1,2 +1 @@
-<?xml version="1.0" encoding="UTF-8" standalone="no"?>
-<svg height="128" version="1.1" enable-background="new 0 0 595.275 311.111" xml:space="preserve" viewBox="0 0 128 128" width="128" xmlns="http://www.w3.org/2000/svg" x="0px" y="0px"><rect height="128" fill="#0082c9" rx="20" ry="20" width="128" x="0" y="-.0000015"/><path fill="#fff" d="m14.222 29.999c-3.4472 0-6.2223 2.7773-6.2223 6.2244v57.561c0 3.4475 2.7751 6.216 6.2223 6.216h99.555c3.4475 0 6.223-2.7685 6.223-6.216v-57.56c0-3.4472-2.7755-6.2244-6.223-6.2244zm5.25 7.1967 42.585 42.585h3.6946l42.777-42.585 4.2778 4.2777-25.472 25.861 19.25 19.639-4.2777 4.2777-19.639-19.639-14.195 14.389h-8.9446l-14.193-14.385-19.64 19.831-4.2781-4.473 19.445-19.639-25.667-25.86z"/></svg>
+<svg width="128" height="128" enable-background="new 0 0 595.275 311.111" version="1.1" viewBox="0 0 128 128" xml:space="preserve" xmlns="http://www.w3.org/2000/svg"><rect y="-1.5e-6" width="128" height="128" rx="20" ry="20" fill="#0082c9"/><path d="m104 24h-80c-5.5 0-9.95 4.5-9.95 10l-0.05 60c0 5.5 4.5 10 10 10h80c5.5 0 10-4.5 10-10v-60c0-5.5-4.5-10-10-10zm0 20-40 25-40-25v-10l40 25 40-25z" fill="#fff" stroke-width="5"/></svg>
diff --git a/img/favicon.ico b/img/favicon.ico
index cfc412d7dd..389751b7c2 100644
Binary files a/img/favicon.ico and b/img/favicon.ico differ
diff --git a/img/favicon.png b/img/favicon.png
index 671697b040..10f8c99b13 100644
Binary files a/img/favicon.png and b/img/favicon.png differ
diff --git a/img/favicon.svg b/img/favicon.svg
index 54afa70344..c815da889b 100644
--- a/img/favicon.svg
+++ b/img/favicon.svg
@@ -1,2 +1 @@
-<?xml version="1.0" encoding="UTF-8" standalone="no"?>
-<svg xml:space="preserve" x="0px" viewBox="0 0 32 32" width="32" xmlns="http://www.w3.org/2000/svg" enable-background="new 0 0 595.275 311.111" version="1.1" height="32" y="0px"><rect fill="#0082c9" ry="5" x="0" width="32" rx="5" height="32" y="-.0000052588"/><path fill="#fff" d="m3.5556 7.4999c-0.8618 0-1.5556 0.6944-1.5556 1.5561v14.39c0 0.86188 0.69378 1.554 1.5556 1.554h24.888c0.862 0 1.556-0.692 1.556-1.554v-14.39c0-0.8621-0.694-1.5565-1.556-1.5565zm1.3125 1.7992 10.646 10.646h0.92366l10.694-10.646 1.0694 1.0694-6.3681 6.4653 4.8125 4.9097-1.0694 1.0694-4.9097-4.9097-3.5487 3.5972h-2.235l-3.548-3.596-4.9101 4.958-1.0695-1.119 4.8616-4.909-6.4171-6.4653z"/></svg>
+<svg width="32" height="32" enable-background="new 0 0 595.275 311.111" version="1.1" viewBox="0 0 32 32" xml:space="preserve" xmlns="http://www.w3.org/2000/svg"><rect width="32" height="32" rx="5" ry="5" fill="#0082c9" stroke-width=".25"/><path d="m26 6h-20c-1.375 0-2.4875 1.125-2.4875 2.5l-0.0125 15c0 1.375 1.125 2.5 2.5 2.5h20c1.375 0 2.5-1.125 2.5-2.5v-15c0-1.375-1.125-2.5-2.5-2.5zm0 5-10 6.25-10-6.25v-2.5l10 6.25 10-6.25z" fill="#fff" stroke-width="1.25"/></svg>
diff --git a/img/forward.png b/img/forward.png
deleted file mode 100644
index a51f4b1033..0000000000
Binary files a/img/forward.png and /dev/null differ
diff --git a/img/forward.svg b/img/forward.svg
deleted file mode 100644
index 789c648a04..0000000000
--- a/img/forward.svg
+++ /dev/null
@@ -1 +0,0 @@
-<?xml version="1.0" encoding="UTF-8" standalone="no"?><svg xmlns="http://www.w3.org/2000/svg" height="16" width="16"><path d="M1 15s.391-7.803 7-10V1l7 7-7 7v-4c-5.116 0-7 4-7 4z"/></svg>
\ No newline at end of file
diff --git a/img/inbox.png b/img/inbox.png
deleted file mode 100644
index 58f8f20df6..0000000000
Binary files a/img/inbox.png and /dev/null differ
diff --git a/img/inbox.svg b/img/inbox.svg
deleted file mode 100644
index 342751a3bb..0000000000
--- a/img/inbox.svg
+++ /dev/null
@@ -1,4 +0,0 @@
-<?xml version="1.0" encoding="UTF-8" standalone="no"?>
-<svg xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns="http://www.w3.org/2000/svg" height="16" width="16" version="1.0" xmlns:cc="http://creativecommons.org/ns#" xmlns:dc="http://purl.org/dc/elements/1.1/">
- <path fill="#000000" d="m8 1.0306-8 7.9694h3v6.0001h10v-6h3l-3-3.0306v-3.9695h-3v1.0812l-2-2.0505z" fill-rule="evenodd"/>
-</svg>
diff --git a/img/junk.png b/img/junk.png
deleted file mode 100644
index 61df76b53e..0000000000
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diff --git a/img/junk.svg b/img/junk.svg
deleted file mode 100644
index 38e4053c33..0000000000
--- a/img/junk.svg
+++ /dev/null
@@ -1,4 +0,0 @@
-<?xml version="1.0" encoding="UTF-8" standalone="no"?>
-<svg xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns="http://www.w3.org/2000/svg" height="16" width="16" version="1.1" xmlns:cc="http://creativecommons.org/ns#" xmlns:dc="http://purl.org/dc/elements/1.1/">
- <path d="m5.5156 2l-3.5156 3.5156v4.9684l3.5156 3.516h4.9684l3.516-3.516v-4.9684l-3.516-3.5156h-4.9684zm1.4844 2h2v5h-2v-5zm0 6h2v2h-2v-2z"/>
-</svg>
diff --git a/img/mail-notification.png b/img/mail-notification.png
index 36b83d4e6d..b65e0ecc08 100644
Binary files a/img/mail-notification.png and b/img/mail-notification.png differ
diff --git a/img/mail-notification.svg b/img/mail-notification.svg
index d8240400e2..ec0752436d 100644
--- a/img/mail-notification.svg
+++ b/img/mail-notification.svg
@@ -1,4 +1 @@
-<?xml version="1.0" encoding="UTF-8" standalone="no"?>
-<svg xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns="http://www.w3.org/2000/svg" height="32" width="32" version="1.0" xmlns:cc="http://creativecommons.org/ns#" xmlns:dc="http://purl.org/dc/elements/1.1/">
- <path d="m1.7778 6c-0.98491 0-1.7778 0.7935-1.7778 1.7784v16.446c0 0.985 0.79289 1.776 1.7778 1.776h28.444c0.985 0 1.778-0.791 1.778-1.776v-16.446c0-0.9849-0.793-1.7784-1.778-1.7784zm1.5 2.0562 12.167 12.167h1.0556l12.222-12.167 1.2222 1.2222-7.2778 7.3889 5.5 5.6111-1.2222 1.2222-5.6111-5.6111-4.0556 4.1111h-2.5556l-4.055-4.11-5.6114 5.666-1.2223-1.278 5.5556-5.611-7.3333-7.3886z" fill="#808080"/>
-</svg>
+<svg width="32" height="32" version="1.0" xmlns="http://www.w3.org/2000/svg"><path d="m28 4h-24c-1.65 0-2.985 1.35-2.985 3l-0.015 18c0 1.65 1.35 3 3 3h24c1.65 0 3-1.35 3-3v-18c0-1.65-1.35-3-3-3zm0 6-12 7.5-12-7.5v-3l12 7.5 12-7.5z" fill="#808080" stroke-width="1.5"/></svg>
diff --git a/img/mail.svg b/img/mail.svg
index e618d6bf7a..626283485e 100644
--- a/img/mail.svg
+++ b/img/mail.svg
@@ -1,4 +1,6 @@
-<?xml version="1.0" encoding="UTF-8" standalone="no"?>
-<svg xmlns="http://www.w3.org/2000/svg" height="32" width="32" version="1.0" viewBox="0 0 32 32">
- <path fill="#FFF" d="m1.7778 6c-0.98491 0-1.7778 0.7935-1.7778 1.7784v16.446c0 0.985 0.79289 1.776 1.7778 1.776h28.444c0.985 0 1.778-0.791 1.778-1.776v-16.446c0-0.9849-0.793-1.7784-1.778-1.7784zm1.5 2.0562 12.167 12.167h1.0556l12.222-12.167 1.2222 1.2222-7.2778 7.3889 5.5 5.6111-1.2222 1.2222-5.6111-5.6111-4.0556 4.1111h-2.5556l-4.055-4.11-5.6114 5.666-1.2223-1.278 5.5556-5.611-7.3333-7.3886z"/>
+<?xml version="1.0" encoding="UTF-8"?>
+<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" width="32px" height="32px" viewBox="0 0 32 32" version="1.1">
+<g id="surface1">
+<path style=" stroke:none;fill-rule:nonzero;fill:rgb(100%,100%,100%);fill-opacity:1;" d="M 26.667969 5.332031 L 5.332031 5.332031 C 3.867188 5.332031 2.679688 6.535156 2.679688 8 L 2.667969 24 C 2.667969 25.464844 3.867188 26.667969 5.332031 26.667969 L 26.667969 26.667969 C 28.132812 26.667969 29.332031 25.464844 29.332031 24 L 29.332031 8 C 29.332031 6.535156 28.132812 5.332031 26.667969 5.332031 Z M 26.667969 10.667969 L 16 17.332031 L 5.332031 10.667969 L 5.332031 8 L 16 14.667969 L 26.667969 8 Z M 26.667969 10.667969 "/>
+</g>
 </svg>
diff --git a/img/reply-all.png b/img/reply-all.png
deleted file mode 100644
index 80a37edc70..0000000000
Binary files a/img/reply-all.png and /dev/null differ
diff --git a/img/reply-all.svg b/img/reply-all.svg
deleted file mode 100644
index 7181d42baf..0000000000
--- a/img/reply-all.svg
+++ /dev/null
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