Allows to abort all ajax calls in the controller without releasing whole controller.

app/assets/javascripts/app/controllers/_application_controller.coffee

@@ -74,8 +74,17 @@ class App.Controller extends Spine.Controller
     App.Event.unbindLevel(@controllerId)
     App.Delay.clearLevel(@controllerId)
     App.Interval.clearLevel(@controllerId)
-    if @ajaxCalls
+    @abortAjaxCalls()
-      for callId in @ajaxCalls
+
+  abortAjaxCalls: =>
+    if !@ajaxCalls
+      return
+
+    idsToCancel = @ajaxCalls
+
+    @ajaxCalls = []
+
+    for callId in idsToCancel
       App.Ajax.abort(callId)
 
   release: ->