Bug fixed

static/plugin_dbui/src/gridfilter.js

@@ -137,7 +137,9 @@ App.grid.GridFilter = Ext.extend(Ext.form.FieldSet, {
         }
         
         // reset the page size to the default value
-        this.pagingToolbar.pageSize = 10;
+        if (this.pagingToolbar) {
+            this.pagingToolbar.pageSize = 10;    
+        }
         
         // update the store
         this.updateStore();