Fixed window visibility issue when trying to exit
Fixed window visibility issue when trying to exit

The window didn't show up when in tray only mode and attempting to exit
the application while watching streams

Klaudit/livestreamer-twitch-gui,bastimeyer/livestreamer-twitch-gui,bastimeyer/livestreamer-twitch-gui,streamlink/streamlink-twitch-gui,Rekapper/livestreamer-twitch-gui,bastimeyer/livestreamer-twitch-gui,Rekapper/livestreamer-twitch-gui,Klaudit/livestreamer-twitch-gui,streamlink/streamlink-twitch-gui,Klaudit/livestreamer-twitch-gui,Rekapper/livestreamer-twitch-gui,streamlink/streamlink-twitch-gui,arclupin/livestreamer-twitch-gui,chhe/livestreamer-twitch-gui,arclupin/livestreamer-twitch-gui,arclupin/livestreamer-twitch-gui,chhe/livestreamer-twitch-gui,chhe/livestreamer-twitch-gui