* Fixes race condition in MediaFileListFragment
The "Play from here" feature previously queued all songs at once using
a loop and did not wait until an add action was confirmed by Kodi
before queueing the next item. This sometimes resulted in a seemingly
random play order on Kodi.
* Fixed play from here adding first item twice
When selecting "Play from here" in the file browser the current
item is started using "playMediaFile" and the subsequent items
are queued. However, the current item was added to the queue
list as well. Resulting in the first item always being added twice
to the playlist.