Changed UI look to more Sailfish-like and fixed problems with layout. 

I did major redesign of the player part of UI to make it more aligned with Sailfish UX guidelines, but trying to keep the spirit of your version. I've moved Play/Pause button in the center, because that place is much easier accessible than bottom left corner when using Jolla smartphone only one-handed.

Also I have switched to Silica Theme values instead of absolute values. This is especially important for other devices that will be running Sailfish on different, yet unknown video resolutions, so that the current layout is much more universal in that sense.