Make the "skip back" button skip back to the beggining of the current track with a single press.
And only skip to the previous track with a consecutive press. This seems to be the standard way of doing things in most music players, and certainly a feature I use a lot in the Android Google Music app.
Implemented in outcoldplayer v4.
We uploaded it to Windows Store, it should be available in next couple days starting from 11/08/2014.
It's crazy that it doesn't do this already. I had one of the very first CD players (Sony) and it had this feature. As did every other media player I've had since!