Classe: SiteAdminAction  - X-Ref

\ingroup Action

Extends the AdminAction class in a way that any class subclassing this one,
will check if the user has SITE_ADMIN privileges to be here. The implementation is
quite simple in the sense that if the UserInfo object that was trying to access
this action doesn't have enough privileges, the action will show a really
ugly message and all processing will stop.

Hopefully future versions will improve this area and show a friendlier message.