Polish the method addFormPanel.

static/plugin_dbui/src/appgridroweditor.js

@@ -75,14 +75,14 @@ App.grid.RowEditor = Ext.extend(Ext.Window, {
         // This approach relies on the Ext.StrMgr.
         // However this approach creates confusion in listeners. 
         // It is why we force the use of the same object.
-        this.formPanel.store = this.grid.store;
+        formCfg.store = null;
         
         // instanciate the form
         this.formPanel = Ext.ComponentMgr.create(formCfg);
+        this.formPanel.store = this.grid.store;
         this.add(this.formPanel);
 
-        // add a listeners to catch store exception
-        // since listener on the formPanel never fire in this context !
+        // add a listeners to catch the store exception
         this.grid.store.on('exception', 
                            this.formPanel.onStoreException, 
                            this.formPanel);