remove underscore from pollSavingStatus

the underscore module is not loading in time for some users on MacOS

services/web/public/coffee/ide/editor/controllers/SavingNotificationController.coffee

@@ -13,11 +13,14 @@ define [
 		$scope.docSavingStatus = {}
 		pollSavedStatus = () ->
 			oldStatus = $scope.docSavingStatus
+			oldUnsavedCount = $scope.docSavingStatusCount
 			newStatus = {}
+			newUnsavedCount = 0
 
 			for doc_id, doc of Document.openDocs
 				saving = doc.pollSavedStatus()
 				if !saving
+					newUnsavedCount++
 					if oldStatus[doc_id]?
 						newStatus[doc_id] = oldStatus[doc_id]
 						newStatus[doc_id].unsavedSeconds += 1
@@ -28,9 +31,12 @@ define [
 						}
 
 			# for performance, only update the display if the old or new
-			# statuses have any unsaved files
-			if _.size(newStatus) or _.size(oldStatus)
+			# counts of unsaved files are nonzeror.  If both old and new
+			# unsaved counts are zero then we know we are in a good state
+			# and don't need to do anything to the UI.
+			if newUnsavedCount or oldUnsavedCount
 				$scope.docSavingStatus = newStatus
+				$scope.docSavingStatusCount = newUnsavedCount
 				$scope.$apply()
 
 		warnAboutUnsavedChanges = () ->