If Profanity is disconnected in any way before ping response is
received, the autoping timer will expire after the next connection
is established. As result, user will be disconnected immediately.
Cancel autoping timer in ev_disconnect_cleanup(), so it is done
for all kind of disconnections.
Call `ui_close_all_wins();` only if we disconnect on purpose not when
connection is lost.
Otherwise users might miss messages.
This partly reverts 6ac73db876c83c7068c4795b19c09ea59eb18a40.
Regards https://github.com/profanity-im/profanity/issues/1083