close all messages when quitting.
compmain should run in a thread, not a proc
clear win fully on close, don't double-send events, tweak shutdown code.
cosmetic fixes, write events back correctly
handle recursive multipart messages
fix fromcolon formatting: no stray spaces
use fromcolon instead of from in message view
switch glyph for new messages
use appropriate default mbox
deletion: finish implementation
tweak sorting: threads go newest too oldest
bugfixes: fix new messages, crashes on empty fields.