Make ThemedImage public
Make ThemedImage public

Makes it possible to retrieve and analyze contained
images for different styles without actually drawing them.

cra0zy/xwt,antmicro/xwt,lytico/xwt,akrisiun/xwt,residuum/xwt,TheBrainTech/xwt,mono/xwt,hamekoz/xwt,hwthomas/xwt