Remove all the object view control within the subnode control, whenever

we remove it.

It will remove all the events, controls, elements, etc associated with
the subnode control.

web/pgadmin/static/js/backgrid/backgrid.pgadmin.js

@@ -139,7 +139,7 @@
       return this;
     },
     remove: function() {
-      this.$dialog.modal("hide").remove();
+      this.objectView.remove();
       Backgrid.CellEditor.prototype.remove.apply(this, arguments);
       if (this.tr) {
         this.tr.remove();