Add the autoscroll on the panel.

static/plugin_dbui/src/appbasepanelwithselector.js

@@ -48,6 +48,7 @@ App.BasePanelWithSelector = Ext.extend(Ext.Panel, {
         cfg = {
             layout: 'border',
             items: [{
+                autoScroll: true,
                 border: false,
                 layout: 'fit',
                 itemId: 'mainPanel',