Cleanly remove gpgol_sigstatus
* src/mapihelp.cpp (get_gpgolsigstatus_tag), (mapi_has_sig_status, mapi_test_sig_status, mapi_get_sig_status) (mapi_set_sig_status): Removed. (mapi_change_message_class): Dont mark non crypto messages. * src/mimemaker.cpp (finalize_message restore_msg_from_moss): Do not set sigstatus.
The sigstatus is not used by current code and is never
read. The save changes caused by the property required
a modification and additional sync for unencrypted messages. So
we need to remove setting it.