music2: ux redesign

Conflicts:
	test_apps/music2/style/css/style.css
Bug 903521 - Camera not working in gaia when run in Firefox
Merge pull request #11470 from hotzenklotz/903521_camera_in_FF

Bug 903521 - Camera not working in gaia when run in Firefox r=kgrandon
Merge pull request #11468 from es92/music2uxUpdate

Music2 UX update
Bug 894738 - Redirect appropriately from ViewEvent after tapping system notification for event alarm pulls us into calendar