Updated Background Playback Mini Roadmap (markdown)

Background-Playback-Mini-Roadmap.md

@@ -21,17 +21,22 @@ thought the following would be parsed by GFM, but nevermind.
 [x]     category
 [x]     return to VideoItemDetail page on notification tap
 [x]     progress bar
-[x]     media controls
+[x]     basic media controls
 [ ]         button icons
 [x] run in thread
 [x] clean up after playback properly
 [x] translation strings
 [x] listen for completion
 [x] lock screen controls
+[ ] improve handling of bg playing a video while another is already playing
         5.0+:
 [ ]         public-private fields of Notification
        <5.0:
 [ ]         implement RemoteControlClient
+[ ] 5.0 Expanded view:
+[ ]     progress bar
+[ ]     video playback & total time
+
 
 ```