Auto-expand the discussion thread after it is scrolled to by simulating a...

Auto-expand the discussion thread after it is scrolled to by simulating a click on the show/hide button. Note: the jQuery highlight effect doesnt work here due to a CSS !important setting on .discussion-module background color.

common/lib/xmodule/xmodule/js/src/annotatable/display.coffee

@@ -105,8 +105,12 @@ class @Annotatable
             onAfter: @makeAfterScroll(el)
         })
  
-    makeAfterScroll: (el, duration = 500) ->
-        @_once -> el.effect 'shake', {}, duration
+    makeAfterScroll: (el, duration = 1500) ->
+        @_once ->
+            btn = $('.discussion-show', el)
+            if !btn.hasClass('shown')
+                btn.click()
+            #el.effect 'highlight', {}, duration
 
     makeTipContent: (el) ->
         (api) =>