Add missing icons and css for icons in layout

app/assets/stylesheets/desktop.css

@@ -12,4 +12,5 @@
  *= require desktopmedia
  *= require orbitTimeline
  *= require orbit-bar
+ *= require icons
 */

app/assets/stylesheets/site_editor.css.erb

@@ -13,4 +13,5 @@
  *= require scroll_style
  *= require site_items
  *= require sidebar
+ *= require icons
 */