Load the store if it is not yet done.

static/plugin_dbui/src/appgrid.js

@@ -30,7 +30,10 @@ App.grid.Grid = Ext.extend(Ext.grid.GridPanel, {
         // initialize the underlying class. DON'T MOVE
         App.grid.Grid.superclass.initComponent.call(this);        
 
-        this.store.load();
+        // load the store if not yet done
+        if (this.store.getCount() === 0) {
+            this.store.load();    
+        }
 
     }
 });