Merge pull request #10773 from nextcloud/collapsible-dark-fix

Accessibility theme fixes

Author: MorrisJobke

apps/accessibility/css/themehighcontrast.scss

@@ -51,8 +51,7 @@ body {
 	font-weight: 400;
 }
 
-// Opacity trick
-* {
+[class^='icon-'], [class*=' icon-'],
+.action {
 	opacity: 1 !important;
 }
-

core/css/apps.scss

@@ -369,7 +369,7 @@ kbd {
 			margin: 0;
 			padding: 0;
 			background: none;
-			background-image: url('../img/actions/triangle-s.svg?v=1');
+			@include icon-color('triangle-s', 'actions', $color-black, 1, true);
 			background-size: 16px;
 			background-repeat: no-repeat;
 			background-position: center;