update drag-sort-listview

[johanv]

drag-sort-listview seems unmaintained: https://github.com/bauerca/drag-sort-listview

It might be interesting to update to the latest version.

I am not sure whether specific features of drag-sort-listview are used. If not, we might just use an ordinary list view as well.

[johanv]

I just noticed that you can change the order of episodes in the playlist by dragging the icons around. This is a cool feature, probably of drag-sort-listview :-)