Allow popup time setting 0 to disable notification

For the newly added content notification

resources/lib/itemtypes.py

@@ -211,6 +211,9 @@ class Items(object):
         return (True, update_videolibrary)
 
     def contentPop(self, name, time=5000):
+        
+        if time: 
+            # It's possible for the time to be 0. It should be considered disabled in this case.
             xbmcgui.Dialog().notification(
                     heading="Emby for Kodi",
                     message="Added: %s" % name,