Merge branch 'I-37064' into 'master'

Remove buttons in epic tree have weird focus state

See merge request gitlab-org/gitlab!21785

app/assets/stylesheets/framework/buttons.scss

@@ -29,7 +29,7 @@
   &:focus,
   &:active {
     background-color: $btn-active-gray;
-    box-shadow: $gl-btn-active-background;
+    box-shadow: none;
   }
 }
 

ee/changelogs/unreleased/I-37064.yml

+---
+title: fix CSS shadowbox on focus
+merge_request: 21785
+author: allenlai18
+type: fixed