Make forum comment buttons activate by keyboard

Neither edit nor delete activated on pressing the space key.

common/static/coffee/spec/discussion/view/response_comment_show_view_spec.coffee

@@ -63,23 +63,30 @@ describe 'ResponseCommentShowView', ->
             @comment.unflagAbuse()
             expect(@comment.get 'abuse_flaggers').toEqual []
 
-    describe 'comment deletion', ->
+    describe '_delete', ->
 
-        it 'triggers the delete event when the delete icon is clicked', ->
+        it 'triggers on the correct events', ->
             DiscussionUtil.loadRoles []
             @comment.updateInfo {ability: {'can_delete': true}}
+            @view.render()
+            DiscussionViewSpecHelper.checkButtonEvents(@view, "_delete", ".action-delete")
+
+        it 'triggers the delete event', ->
             triggerTarget = jasmine.createSpy()
             @view.bind "comment:_delete", triggerTarget
-            @view.render()
-            @view.$el.find('.action-delete').click()
+            @view._delete()
+            expect(triggerTarget).toHaveBeenCalled()
 
-    describe 'comment edit', ->
+    describe 'edit', ->
 
-        it 'triggers comment:edit when the edit button is clicked', ->
+        it 'triggers on the correct events', ->
             DiscussionUtil.loadRoles []
             @comment.updateInfo {ability: {'can_edit': true}}
+            @view.render()
+            DiscussionViewSpecHelper.checkButtonEvents(@view, "edit", ".action-edit")
+
+        it 'triggers comment:edit when the edit button is clicked', ->
             triggerTarget = jasmine.createSpy()
             @view.bind "comment:edit", triggerTarget
-            @view.render()
-            @view.$el.find(".action-edit").click()
+            @view.edit()
             expect(triggerTarget).toHaveBeenCalled()

common/static/coffee/src/discussion/views/response_comment_show_view.coffee

@@ -2,8 +2,14 @@ if Backbone?
   class @ResponseCommentShowView extends DiscussionContentView
 
     events:
-        "click .action-delete": "_delete"
-        "click .action-edit": "edit"
+        "click .action-delete":
+          (event) -> @_delete(event)
+        "keydown .action-delete":
+          (event) -> DiscussionUtil.activateOnSpace(event, @_delete)
+        "click .action-edit":
+          (event) -> @edit(event)
+        "keydown .action-edit":
+          (event) -> DiscussionUtil.activateOnSpace(event, @edit)
 
     tagName: "li"
 
@@ -52,7 +58,7 @@ if Backbone?
       else if DiscussionUtil.isTA(@model.get("user_id"))
         @$el.find("a.profile-link").after('<span class="community-ta-label">' + gettext('Community TA') + '</span>')
 
-    _delete: (event) ->
+    _delete: (event) =>
         @trigger "comment:_delete", event
 
     renderFlagged: =>