Summary: This CSS fix replaces the hard coded background gradient (white) value of icons when using Dark Mode. Now the "Choose User Icon" popup has visible icons. | Before | After | |---------|---------| |{F331622}|{F331623}| Ref T15056 Test Plan: - Flush all Phorge caches - Sign in - Go to user's Settings > Display Preferences and select the Accessibility (user interface) "Dark Mode". - Go to user's profile, edit profile and click on Choose icon. - Check that now the icons in "Choose User Icon" are visible. - Do these steps for each user interface theme in order to check against regression. Reviewers: O1 Blessed Committers, Matthew, valerio.bozzolan Reviewed By: O1 Blessed Committers, Matthew, valerio.bozzolan Subscribers: speck, tobiaswiese, valerio.bozzolan, Matthew, Cigaryno Maniphest Tasks: T15056 Differential Revision: https://we.phorge.it/D25384