Added a CSS rule to switch moon-icons back to being center aligned if they are placed inside a moon.Header's client area.
Enyo-DCO-1.1-Signed-off-by: Blake Stephens <blake.stephens@lge.com>
Merge pull request #1195 from enyojs/BHV-2417-blakestephens

BHV-2417: Set moon.Icons to center text-align when inside moon.Header client area

Reviewed-By: Ben Combee (ben.combee@lge.com)