[Azoth OTRoid] Some cosmetic changes.
[Azoth OTRoid] Show pre-formated text.

Show pre-formated text instead of plain text when unencrypted message is
recieved during active OTR session. This magic hack is required only for
libotr 4.x to force all work as in libotr 3.2.x.
[Azoth OTRoid] Changed the order of checks when new message is received.