* src/mail.cpp, src/mail.h (Mail::WantsSendMIME)
(Mail::WantsSendInline): More explicit states.
(Mail::update_crypt_oom): Switch into Inline send for inline
body.
(Mail::update_crypt_mapi): Switch into WantsSendMime.
* src/mailitem-events.cpp (EVENT_SINK_INVOKE): Pass inline mails
directly.