fix: layers panel caret outline hidden by the row below

Author: devvaannsh

src/styles/Extn-LayersPanel.less

@@ -804,6 +804,7 @@
         }
 
         &.layers-caret-target {
+            z-index: 1;
             box-shadow: inset 0 0 0 1px fade(@layers-accent, 55%);
         }
 
@@ -817,7 +818,7 @@
 
         &.layers-moving {
             position: relative;
-            z-index: 1;
+            z-index: 2;
             transition: transform 260ms cubic-bezier(0.2, 0, 0, 1);
         }