Merge branch 'simplify-ide-colors' into 'master'

Simplify Web IDE colors

See merge request gitlab-org/gitlab!25304

app/assets/stylesheets/page_bundles/ide.scss

@@ -75,7 +75,7 @@ $ide-commit-header-height: 48px;
 
 .multi-file-tabs {
   display: flex;
-  background-color: $white-normal;
+  background-color: $gray-light;
   box-shadow: inset 0 -1px $white-dark;
 
   > ul {

changelogs/unreleased/simplify-ide-colors.yml

+---
+title: Simplifying colors in the Web IDE
+merge_request: 25304
+author:
+type: other