prevent defaults added

lms/static/coffee/src/discussion/discussion_module_view.coffee

@@ -24,6 +24,7 @@ if Backbone?
         @newPostForm.slideUp(300)
 
     hideNewPost: (event) ->
+      event.preventDefault()
       @newPostForm.slideUp(300)
 
     toggleDiscussion: (event) ->

lms/static/sass/_discussion.scss

@@ -1578,7 +1578,9 @@ body.discussion {
   }
 
   section.discussion {
-  /* Course content p has a default margin-bottom of 1.416em, this is just to reset that */
+    margin-top: 20px;
+
+    /* Course content p has a default margin-bottom of 1.416em, this is just to reset that */
     .discussion-thread {
       padding: 0.5em 0;