Currently UiAction imlementation has to provide isVisible() method.
If UiAction specifies RequiresCapability annotation, then that check
can be done during UiAction gathering. The following prerequisities
must be met, to satisfy the check:
1. user has to be authenticated
2.1 user is a member of the Administrators group or
2.2 user is a member of a group, which has the required capability
Change-Id: I0bfb8dd5048bd2a52583f83aa38105bc176f1cca
eb47db12fe