Try to fix crashes in MAPI SubmitMessage path
* src/windowmessages.cpp (gpgol_window_proc): Close inspector before closing the mail.
This is purely experimental programming. The SubmitMessage paths
both lead to random crashes. So I tried around what might
be the cause and found this. Let's hope it is not just luck
that it currently does not crash for me.
- GnuPG-Bug-Id: T4131