do not allow to have two windows of join_gc for the same account and changing the join gc window title if multiple accounts

(hangs anyway for me)

STARTING TO: now allow Ctrl+V to chat windows, do not ESC --> close tab (or window) in GC. SEE FIXMEs

if x: set(true) else: set(false)
become
set(x)

basically popup notifications allow when not online/chat works. so popup notifications I think are 100% ready :P. some other fixes too