APPWTV-41, 32, others

Several changes to the media and device management at store and model level and connectUi  
Ui improvements: tapping on the device queue panel now show all items playing on the selected device. Also the select/deselect behavior for that panel should now be fixed.  
Reduced and simplified media types and categories in a more functional way.  
Added a VideoMPListItem class for video, but must yet be edited to better represent Video Item previews.