Ticket #49951: 49951.diff

src/wp-admin/css/themes.css

@@ -1104 +1104 @@
         }
 }
 
+@media only screen and (max-width: 782px) {
+        .upload-theme .wp-upload-form,
+        .upload-plugin .wp-upload-form {
+                display: block;
+        }
+}
+
 .theme-details .theme-rating {
         line-height: 1.9;
 }