Fixing sound applet issues #2807 and #3284

#2807: https://github.com/pixunil/Cinnamon/commit/e8a22a4046032aef26caba5f1db67b880037bdda
#3284: https://github.com/pixunil/Cinnamon/commit/5f0712a50254450f8ccf306e9d4d4d123dedc77a