Fixes #649 profile notifications

## Solves the following problems

* Lots of clients want to be notified when a new profile has been added manually.
* Lots of clients want the new profile to automatically receive an e-mail containing login credentials, when the profile has been added/updated manually by a Fork CMS user.
* When "automailing to profile" is activated, it is also possible to let the "password" field empty. Because the password can now be auto-generated behind the scene and mailed to the profile.

More info: #649 
@WouterSioen "If this would never be needed",
I consider to removing the password field completely in Edit...

But I can find some use cases:
If GOD added a dealer to the profiles module, that person will get an email with the login credentials. When that dealer says to GOD, hey I forgot my password, can you help me out here. Then GOD could just log in, check "new password", click "save" and then that dealer would receive an email with the new login credentials.