Fixed JS error in Table Properties dialog, b=116393, fix by glazman, r=cmanske, sr=jag

editor/ui/dialogs/content/EdTableProps.js

@@ -205,7 +205,7 @@ function Startup()
       // XXX: Disabling of tabs is currently broken, so for
       //      now we'll just remove the tab completely.
       //CellTab.setAttribute("disabled", "true");
-      CellTab.parentNode.removeChild(CellTab);
+      gDialog.CellTab.parentNode.removeChild(CellTab);
     }
   }