Text Color Picker

Integrated a new text colour picker. Presentation is available here - http://goo.gl/OsV33b.

I wasn't able to overcome the problem of applying the colour when the user clicks in the editor, so instead the picker has "Select" and "Cancel" buttons. Clicking off of the picker will also cancel any colour selection. You can enter a colour value in the textbox.

@stulees @ByronDarlison @dlugo00 @mmeiers