Fixes Bug 1041449, Visual Update for Bug 983043 , r=mnjul

Squashed and Patch to bug 1041449
Patches Duplicate bug 887148

Resolves. Lockscreen PIN Keypad visual update for Bug 983043

Since the style is the same for all a.row0, a.row1, and a.row2, you might want to combine lines 569 ~ lines 578 into one single rule.