Change battery icon text size to match clock

My first successful cherry pick from PSX! 

Font size is clearer and you don't need glasses anymore to read what the percentage is. Thank you both for your trees - just trying to git what all this means here :) 

Feel free to reject - just ploughing back what i found useful. Next I will try to learn to merge the MMS app from Slimrom to enable read notifications .. or maybe a port to maguro :)