property [name] - Represent context menu item's identify.
property [text] - Represent the text to be shown,if this context menu item is a group,text will be shown as DOM element's title.
property {string|Function} [command] - Represent a command name,commandManager will use this as index to find this command,if this command exist,then execute it.
property [disable] - Represent this context menu item is disabled under current condition, default value is false.
property [iconClass] - Represent this context menu item's icon,it is a class name.
property [group] - Represent this context menu item is a group menu item and this property's value should be it's group header's name.