Visual cleanup of nowplaying widget

patch by Tjaart Blignaut

This patch
- allows the now playing widget to automatically size text when the widget is sized. The sizing is a function of height with some of the width also causing teh text to size.
- makes the play controls slighty bigger and easier to press
- Adds some margins to all the controls
- makes the progress bar a bit fatter
- Removed the "by" and "on" text
REQUEST:108969