Change the "receive PM from" to "members allowed to contact me" (i.e. it affects also sending of emails) - topic 76

Signed-off-by: emanuele <emanuele45@gmail.com>
Generalizing "PM settings" to "contact settings"

Signed-off-by: emanuele <emanuele45@gmail.com>
Merge pull request #902 from emanuele45/contact_me

Change the "receive PM from" to "members allowed to contact me"