Move layout-left comment indicators above the review panel toggle bar (#8031)

GitOrigin-RevId: b6902c6d1a3f519aedbdc487801f114c2f57340c

services/web/frontend/stylesheets/app/editor/review-panel.less

@@ -215,6 +215,7 @@
 
 .rp-entry-indicator {
   display: none;
+  z-index: 2; // above .review-panel-toggler
   .rp-size-mini & {
     display: block;
   }