Handle z-index issues with mini review panel.

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

@@ -85,6 +85,7 @@
 	.rp-size-mini & {
 		display: block;
 		width: @review-off-width;
+		z-index: 6;
 	}
 	
 	position: absolute;
@@ -157,7 +158,6 @@
 	display: none;
 	.rp-size-mini & {
 		display: block;
-		z-index: 12;
 	}
 	position: absolute;
 	left: 2px;
@@ -193,21 +193,22 @@
 		display: none;
 		left: @review-off-width + @rp-entry-arrow-width;
 		box-shadow: 0 0 10px 5px rgba(0, 0, 0, .2);
-		z-index: 11;
+		z-index: 1;
 
 		&::before {
-			.triangle(left, @rp-entry-arrow-width, @rp-entry-arrow-width * 1.5, inherit);
-			top: (@review-off-width / 2) - @rp-entry-arrow-width;
-			left: -(@rp-entry-ribbon-width  + @rp-entry-arrow-width);
-			content: '';
-		}
-		&::after {
 			content: '';
 			position: absolute;
 			top:  -(@review-off-width + @rp-entry-arrow-width);
 			right: -(@review-off-width + @rp-entry-arrow-width);
 			bottom: -(@review-off-width + @rp-entry-arrow-width);
 			left: -(@review-off-width + @rp-entry-arrow-width);
+			z-index: -1;
+		}
+		&::after {
+			.triangle(left, @rp-entry-arrow-width, @rp-entry-arrow-width * 1.5, inherit);
+			top: (@review-off-width / 2) - @rp-entry-arrow-width;
+			left: -(@rp-entry-ribbon-width  + @rp-entry-arrow-width);
+			content: '';
 		}
 	}
 	.rp-state-current-file-expanded & {