Reduce hint label width to prevent Lato overdraw

The 'WXYZ' hint label in the 9 pad is slightly too wide when Lato
is applied, causing the label to be drawn a little outside the button.

Change-Id: Ie597feecf44d47a1e52529dc0e86880ba34f1bf2
Merge pull request #1 from CarbonDev/kk

Reduce hint label width to prevent Lato overdraw