Continued with rewrites:

Continued with rewrites:
- moved selectableContacts to contact controller, makes more sense
- fixed template for above
- introduced isGenderRequired() to make difference between general and administrative contact controller
- added new context parameter for above method
- fired event when a new user account has been linked with existing contact data
- the other event (added user) is being fired now on else path
- No more need for afterAdminAddedContact() in general user controller

Signed-off-by: Roland Häder <roland@mxchange.org>