Ticket #65151: 65151.diff

src/wp-admin/css/dashboard.css

@@ -58 +58 @@
 #dashboard-widgets .meta-box-sortables {
         display: flow-root; /* avoid margin collapsing between parent and first/last child elements */
         /* Required min-height to make the jQuery UI Sortable drop zone work. */
-        min-height: 0;
+        min-height: 100px;
         margin: 0 8px 20px;
         padding: 0;
 }