Fix thread status icon adding in original index.

Don't depend on page number.
Also added retina CSS class as in 4chan.

src/General/lib/thread.class

@@ -30,13 +30,11 @@ class Thread
       src: "//s.4cdn.org/image/#{typeLC}#{if window.devicePixelRatio >= 2 then '@2x' else ''}.gif"
       alt:   type
       title: type
-      className: "#{typeLC}Icon"
+      className: "#{typeLC}Icon retina"
     root = if type is 'Closed' and @isSticky
       $ '.stickyIcon', @OP.nodes.info
-    else if g.VIEW is 'index'
-      $ '.page-num',  @OP.nodes.info
     else
-      $ '[title="Reply to this post"]', @OP.nodes.info
+      $('.page-num',  @OP.nodes.info) or $('[title="Reply to this post"]', @OP.nodes.info)
     $.after root, [$.tn(' '), icon]
 
   kill: ->