Make sure LadderView displays a valid link back to levels for course arenas

app/templates/play/ladder/ladder.jade

@@ -4,7 +4,7 @@ block content
 
   div#ladder-top
     
-    if leagueType == 'course'
+    if leagueType == 'course' && view.course.id
       #course-header
         #course-details-link
           a(href="/courses/"+view.course.id+"/"+view.league.id)

app/views/ladder/LadderView.coffee

@@ -63,6 +63,7 @@ module.exports = class LadderView extends RootView
     return if @destroyed
     course = new Course({_id: courseInstance.get('courseID')})
     @course = @supermodel.loadModel(course, 'courses.course').model
+    @listenToOnce @course, 'sync', @render
 
   onLoaded: ->
     @teams = teamDataFromLevel @level