Moving navigation check to controller

app/assets/javascripts/admin/utils/directives/navigation_check.js.coffee

@@ -1,10 +0,0 @@
-angular.module("admin.utils").directive "navCheckCallback", (NavigationCheck)->
-  restrict: 'A'
-  scope:
-    navCheckCallback: '&'
-  link: (scope,element,attributes) ->
-    # Provide a callback, otherwise this default will be used:
-    callback = scope.navCheckCallback()
-    callback ||= ->
-      "You will lose any unsaved work!"
-    NavigationCheck.register(callback)