improvement and rename of the wide/layout less editor

Conflicts:
	src/Umbraco.Web.UI.Client/src/canvasdesigner/editors/wide.html
	src/Umbraco.Web.UI.Client/src/canvasdesigner/editors/wide.js
	src/Umbraco.Web.UI.Client/src/canvasdesigner/editors/wide.less
use thumbnail in media list
New design for the tuning, all panel at the left sight

Conflicts:
	src/Umbraco.Web.UI.Client/src/canvasdesigner/canvasdesigner.controller.js
	src/Umbraco.Web.UI.Client/src/canvasdesigner/canvasdesigner.front.js
	src/Umbraco.Web.UI.Client/src/canvasdesigner/index.html
Various Styles Bug fixed and improvement

Conflicts:
	src/Umbraco.Web.UI.Client/src/canvasdesigner/editors/background.html
	src/Umbraco.Web.UI.Client/src/canvasdesigner/editors/color.html
	src/Umbraco.Web.UI.Client/src/canvasdesigner/editors/slider.html
Renames Tuning to canvasdesigner (code and comments)