Fix OSX tray icon
Fix OSX tray icon

See https://github.com/nwjs/nw.js/wiki/Tray#trayiconsaretemplates

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