Add track name and album art to panel
Improved sound applet settings
Changed some text slightly
Updates to sound applet.

Fix tracks with no album art.
Swap showing track name / art defaults to false.
Remove double try from sound applet init
Fix sound applet artwork icon.
Merge branch 'sound_extension_updates' of https://github.com/Psykar/Cinnamon into Psykar-sound_extension_updates
Fixed a few issues in sound applet