Create PlexPlayQueue.xml

ID 10094
Fix Music playqueue list layout clipping.
Show track title instead of album for music play queue items.
Show item info panel at left, and fix list focus.
[RasPlex] Avoid thumbs loading when entering Media Window

This causes a huge delay (10 secs) so we'd like to avoid it :)
Merge pull request #1123 from RasPlex/PR-NoThumbsLoading

[RasPlex] Avoid Thumbs loading when entering Media Window
Fix black screen when stop playing a playlist

This was because we alway set the currentPlaylist when the play queue
was refreshed.

Fixes #1126
Fix crash when opening context menu on a music item
Fix so that MusicOSD can be visible on NowPlaying
Added google mock
Removed dead code
Add support for ListItem.CompositeImage(args)

This accepts the composite image call arguments.

Fixes #1121
Remove old references to Thumb0/1/2/3 replace with CompositeImage
Add Plex.PlayAll / Plex.ShuffleAll to the commands list.

Related to #1107
Always refresh playQueue fanout.

Avoids the playQueue list being stuck.
Create left bar icons.
Add Filters, Now Playing, Play All and Shuffle All buttons in Library levels.
Further tweaks for currently playing list view.
Kill API calls to /library/sections on plex.tv
Remove our own Art methods in GUIListItem

We don’t need this anymore with the composite image stuff.