RadRibbonBar's contextual tabs allows you to group a number of tabs based on some
context. Contextual tabs are contained in a contextual tab group and following Microsoft's
Ribbon spec they are positioned always last, after the normal set of tabs.
Contextual tab groups are inactive by default. They can be enabled if their Active property is set to true.
There are two modes in which RadRibbonBar's contextual tabs operate:
Only active contextual tab groups are rendered by default. Activating/deactivating
contextual tab groups happens on the server only. This method is useful when the
RibbonBar is in a UserControl used in more than one pages and each context depends
on the current page.
If the RenderInactiveContextualTabGroups property is set
to true, the inactive groups will be rendered and send
to the browser. In this case they will be initially invisible. They can be activated
and active groups can be dactivated dynamically on the page with the client-side