Remove button in the pref app removes the complete account because we don't have separate chains any more. The pref app stays a mess, needs some layout love! (I did it even look worse...)
The new account/mail settings classes know if they have been changed but the current pref panel does not use this feature very well. It always mark the settings as modified when the settings view is displayed or more precise when the settings view is detached from the pref window, this could be optimized. The according mail protocol is completely restarted when their settings changed.
Some system filters are now directly integrated in the mail protocols. Hopefully make things easier to understand.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@40398 a95241bf-73f2-0310-859d-f6bbb57e9c96
