Fix loading image expansion in clones.

src/features.coffee

@@ -3224,8 +3224,15 @@ ImageExpand =
       name: 'Image Expansion'
       cb:   @node
   node: ->
-    return unless @file and @file.isImage
-    $.on @file.thumb.parentNode, 'click', ImageExpand.cb.toggle
+    return unless @file?.isImage
+    {thumb} = @file
+    $.on thumb.parentNode, 'click', ImageExpand.cb.toggle
+    if @isClone and $.hasClass thumb, 'expanding'
+      # If we clone a post where the image is still loading,
+      # make it loading in the clone too.
+      ImageExpand.contract @
+      ImageExpand.expand @
+      return
     if ImageExpand.on and !@isHidden
       ImageExpand.expand @
   cb: