Close windows on connection loss not general disc.

Call `ui_close_all_wins();` only if we disconnect on purpose not when
connection is lost.

Otherwise users might miss messages.

This partly reverts 6ac73db876.
Regards https://github.com/profanity-im/profanity/issues/1083

src/event/client_events.c

@@ -86,6 +86,7 @@ cl_ev_disconnect(void)
     cons_show("%s logged out successfully.", jidp->barejid);
     jid_destroy(jidp);
 
+    ui_close_all_wins();
     ev_disconnect_cleanup();
 }