NB 7.2 HR integration request: #214172 - "Overrides and is overridden" sign doesn't work

Description:
http://netbeans.org/bugzilla/show_bug.cgi?id=214172

Clicking on the overrides-and-is-overridden annotation does not work in 
the C++ editor. After partial fix of bug #105746, actions on glyph 
gutter can (and should) list annotation on which they should be called, 
and the C/C++ navigation action is missing an annotation type in that list.

Impact assessment: functional regression, confusing as clicking on other 
annotations works.

Risk assessment: risk is very low - the fix only adds the required 
annotation type into the list of annotation types supported by the 
navigation action.

The fix has been reviewed by Vladimir Voskresensky and verified by 
[email protected].

Changeset:
http://hg.netbeans.org/main-golden/rev/c560fadaf6fe

Thanks for review,
    Jan