Only passthrough event once.  Fixes #1309
Only passthrough event once.  Fixes #1309

MarshallOfSound/Google-Play-Music-Desktop-Player-UNOFFICIAL-,petuhovskiy/Google-Play-Music-Desktop-Player-UNOFFICIAL-,n4k1/Google-Play-Music-Desktop-Player-UNOFFICIAL-,n4k1/Google-Play-Music-Desktop-Player-UNOFFICIAL-,petuhovskiy/Google-Play-Music-Desktop-Player-UNOFFICIAL-,n4k1/Google-Play-Music-Desktop-Player-UNOFFICIAL-,MarshallOfSound/Google-Play-Music-Desktop-Player-UNOFFICIAL-,MarshallOfSound/Google-Play-Music-Desktop-Player-UNOFFICIAL-,petuhovskiy/Google-Play-Music-Desktop-Player-UNOFFICIAL-