Accessibility: Administration: Respect the prefers-reduced-motion media query for update icon spinner animations.

The update icon rotation should not occur when the user has opted to reduce motion, for example by selecting the "Reduce motion" option in macOS' preferences or unselecting "Show animations in Windows" in Windows' preferences.

Follow-up to [47813], [50027].

Props xkon, audrasjb, johnbillion.
Fixes #52263. See #51476.
Built from https://develop.svn.wordpress.org/trunk@50028


git-svn-id: http://core.svn.wordpress.org/trunk@49729 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/css/admin-bar-rtl.css

@@ -594,6 +594,12 @@ html:lang(he-il) .rtl #wpadminbar * {
 	animation: rotation 2s infinite linear;
 }
 
+@media (prefers-reduced-motion: reduce) {
+	#wpadminbar #wp-admin-bar-updates.spin .ab-icon:before {
+		animation: none;
+	}
+}
+
 /**
  * Search
  */

wp-includes/css/admin-bar.css

@@ -593,6 +593,12 @@ html:lang(he-il) .rtl #wpadminbar * {
 	animation: rotation 2s infinite linear;
 }
 
+@media (prefers-reduced-motion: reduce) {
+	#wpadminbar #wp-admin-bar-updates.spin .ab-icon:before {
+		animation: none;
+	}
+}
+
 /**
  * Search
  */