Ticket #28842: 28842.5.diff

src/wp-includes/css/media-views.css

@@ -931 +931 @@
 
 .media-grid-view .attachment .check {
         display: block;
+        opacity: .3;
 }
 
+.media-grid-view .attachment:hover .check,
+.media-grid-view .attachment.selected .check {
+        opacity: 1;
+}
+
 .media-grid-view .attachment .check div {
         background-position: 21px 0;
 }