fix notification remove overflow bug

app/assets/javascripts/app/controllers/widget/online_notification.coffee

@@ -113,9 +113,7 @@ class App.OnlineNotificationWidget extends App.Controller
       processData: true
     )
 
-  onShow: =>
-    @updateContent()
-
+  updateHeight: =>
     # set height of notification popover
     notificationsContainer  = $('.js-notificationsContainer')
     heightApp               = $('#app').height()
@@ -131,6 +129,10 @@ class App.OnlineNotificationWidget extends App.Controller
 
     notificationsContainer.find('.popover-content').css('height', "#{heightPopoverContentNew}px")
 
+  onShow: =>
+    @updateContent()
+    @updateHeight()
+
     # mark all notifications as read
     notificationsContainer.find('.js-markAllAsRead').on('click', (e) =>
       e.preventDefault()
@@ -221,7 +223,7 @@ class App.OnlineNotificationWidget extends App.Controller
       row = $(e.target).closest('.activity-entry')
       id = row.data('id')
       App.OnlineNotification.destroy(id)
-      @resetHeight()
+      @updateHeight()
     )
 
   createContainer: =>
@@ -254,7 +256,3 @@ class App.OnlineNotificationWidget extends App.Controller
     @counterUpdate(0)
     @toggle.popover('destroy')
 
-  resetHeight: ->
-    notificationsContainer = $('.js-notificationsContainer')
-    notificationsContainer.find('.popover-content').css('height', 'auto')
-