Merge branch 'fix-ide-project-avatar-styles' into 'master'

Fix IDE avatar flex sizing style

See merge request gitlab-org/gitlab-ce!21443

app/assets/stylesheets/page_bundles/ide.scss

@@ -1199,7 +1199,7 @@ $ide-tree-text-start: $ide-activity-bar-width + $ide-tree-padding;
   }
 
   .avatar-container {
-    flex: initial;
+    flex: 0 0 auto;
     margin-right: 0;
   }