Merge **unreleased** 20.7 code freeze and editorialized release notes into trunk

[mokagio]

We normally merge the code freeze once the associated first beta build has been submitted to Google Play. In this instance, because of the 20.6.1 hotfix work which still hasn't been merged together with what was most likely a Google Play bug (as reported by other folks, too) we haven't been yet able to submit.

It's useful to merge even if the usual requirements haven't been satisfied because we need the frozen strings, see 8239864, to be sent up to GlotPress for translation.

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• New version header in RELEASE-NOTE.txt
• Version updates in version.properties
• release_notes.txt updated with notes from RELEASE-NOTE.txt for current version
• strings.xml updates via automation merging values from libraries
• Switched ext versions to stable releases

[wpmobilebot]

Found 1 violations:

The PR caused the following dependency changes:

-\--- org.wordpress:login:trunk-692264f8a2a0efa540b7713d3e1ad7fc09b87d47
+\--- org.wordpress:login:0.19.0

Please review and act accordingly

[wpmobilebot]

You can test the WordPress changes on this Pull Request by downloading an installable build (wordpress-installable-build-pr17145-afb680b.apk), or scanning this QR code:

[wpmobilebot]

You can test the Jetpack changes on this Pull Request by downloading an installable build (jetpack-installable-build-pr17145-afb680b.apk), or scanning this QR code:

[antonis]

Thank you for wrangling this @mokagio 🙇
The code changes look consistent to me and the apps behave as expected 🎉

Note: I've noticed an issue with the Google login flow but this is also reproducible on trunk. I'll investigate further and report in a separate issue.

[AliSoftware]

This is Jetpack release notes yet we're talking about links being changed from green to WordPress blue… suspicious … wasn't that entry supposed to be on the WordPress release notes instead of the Jetpack one? 🤔

cc @SiobhyB @dcalhoun @mokagio

[SiobhyB]

@AliSoftware, thanks for double-checking here! As we chatted about in Slack too, the release notes here are correct. There were a lot of blue/green colour clashes in the editor in the Jetpack app, which looked pretty off-putting. Following the discussions in wordpress-mobile/gutenberg-mobile#4889 and wordpress-mobile/gutenberg-mobile#5047, we decided to change the colours in the editor from green to blue in the Jetpack app.