! Remove option to not have an outbox in PM's, why would you not want to have a sent items folder anyway

Signed-off-by: Spuds <spuds@spudsdesign.com>
! change the default view for PM's to conversation

Signed-off-by: Spuds <spuds@spudsdesign.com>
Merge pull request #922 from Spuds/master

Remove Outbox / Sent Items option