Corrected the color of disabled `moon.Button`s
Spacing/indenting corrections too.

Enyo-DCO-1.1-Signed-off-by: Blake Stephens <blake.stephens@lge.com>
Merge pull request #1627 from enyojs/BHV-14646-blakestephens

BHV-14646: Corrected the color of disabled `moon.Button`s