Many a times when ExtJs context menu (Right Click Menu) is added to components, it creates a problem as browser right click menu comes up after ExtJs right click menu is displayed. This is one of common issues posted on ExtJs forums consistently. Here is a simple way to solve the problem:
Add the following line:
Ext.getBody().on("contextmenu", Ext.emptyFn, null, {preventDefault: true});
as first line on ExtJs onReady function.
