quick_search.c: removed debug print.
implemented multiple keywords search of the quick search entry.
applied a patch to fix quick search text color on dark themes.
suppress filter debug output of quick search.
added 'In addressbook' to the quick search menu.
show description when the quick search entry doesn't have focus.
added status label to display number of matched messages in quick search.
added 'Last 7 days' to the quick search.
added 'Edit/Quick search' menu. Also search To: header in Sent/Draft/Queue folders.
added missing include.
fixed crash on quick search menu change.
implemented vertical view. Separated quick search into another module.