ENYO-2328: Ares CSS style editor: first step

Ready for review.

Summary:
As first step; what is implemented:
* add "STYLE" radioButton that displays the CssEditor
* implement the CssEditor kind that renders the repeater category style list 
* CssEditor is currently handling;

	"Background-Style", properties: "background-color,background-image,background-position"
	"Border-Style", properties: "border-style,border-width"
	"Font-Style", properties: "font-size,font-family"
	"Text-Style", properties: "text-indent"
	"Position-Style", properties: "top,left,right,bottom"

Enyo-DCO-1.1-Signed-off-by: Marie-Antoinette de Bonis-Hamelin (Marian)
marie-antoinette.de-bonis-hamelin@hp.com