Integration of Font Picker into Text Widget

This pull request is only for the integration of the font picker into the editor of the Text Widget's settings.

Demo Presentation - http://rdn-test.appspot.com/#PRESENTATION_MANAGE/id=7bd044be-d0d3-4129-ae37-d7892f728f4a/company=b428b4e8-c8b9-41d5-8a10-b4193c789443

@ByronDarlison @dlugo00 @mmeiers @stulees