Removes uneeded left sidebar header.

 On branch page_header
	modified:   app/assets/javascripts/backbone/entities/abstract/property_nav.js.coffee
	modified:   app/assets/javascripts/backbone/lib/components/left_sidebar/show/show_controller.js.coffee
	modified:   app/assets/javascripts/backbone/lib/components/left_sidebar/show/templates/show_nav.jst.hbs
	deleted:    app/assets/javascripts/backbone/lib/components/left_sidebar/show/templates/show_property.jst.hbs
	modified:   app/assets/stylesheets/components/page_sidebar_header.css.scss