Facade the allowHtml property of moon.GridListImageItem onto its children so they can display HTML.
Enyo-DCO-1.1-Signed-off-by: Blake Stephens <blake.stephens@lge.com>
Merge pull request #1191 from enyojs/BHV-2112-blakestephens

BHV-2112: Facade the allowHtml property of moon.GridListImageItem onto its children...