Cleanup Music View

Move to using SideBladeLeft to mimic the video navigation view
Fix separator in Now Playing controls

Add separator into the SideBladeLeft controls for currently playing
media
Cleanup Movie Library view

Update skin to allow the correct button id (2) to be used for switching
through viewtypes
Fix trailer play

Update to fix playing trailers, possibly broken by
39923147194f20bee7e742f9a88221e0ff72667b