Replace notify-send with gdbus for notifications
Replace notify-send with gdbus for notifications

This lets us instantly update notifications when additional messages
arrive.

das7pad/hangups,dxd132630/hangups,taigrr/hangups,j16sdiz/hangups,ddboline/hangups,jodizzle/hangups,hangoutsbot/hangups,baskervald/hangups,AshenDrops/hangups,tdryer/hangups