Pause/play/repeat/etc buttons

[alex-tee]

Feature request: add buttons to control playback, and also a repeat button to repeat the sample (or the current folder/list)

[ayyi]

Just to day that I am looking into this issue. It is slightly confusing because different buttons are shown depending on which player is in use. I will look into adding a repeat button for certain players.

[unfa]

This is much needed. The playback controls right now are very difficult to operate.