Download dialog redesign, code cleanup

ui/media/js/utils.js

@@ -1055,3 +1055,14 @@ async function deleteKeys(keyToDelete) {
         });
     }
 }
+
+function modalDialogCloseOnBackdropClick(dialog) {
+    dialog.addEventListener('mousedown', function (event) {
+        var rect = dialog.getBoundingClientRect()
+        var isInDialog=(rect.top <= event.clientY && event.clientY <= rect.top + rect.height
+          && rect.left <= event.clientX && event.clientX <= rect.left + rect.width)
+        if (!isInDialog) {
+            dialog.close()
+        }
+    })
+}