Toggle left sidebar menu.

	modified:   app/assets/javascripts/backbone/apps/header/show/show_controller.js.coffee
	modified:   app/assets/javascripts/backbone/apps/properties/layout/layout_controller.js.coffee
	modified:   app/assets/javascripts/backbone/apps/properties/layout/layout_view.js.coffee
	modified:   app/assets/stylesheets/shared.css.scss