[FIX] sap.m.NotificationListItem: 'classList' exception is now fixed
[FIX] sap.m.NotificationListItem: 'classList' exception is now fixed

Now we're first check if the specific domRef is rendered

Change-Id: Id05854297d0f71561616c665b377e315945dbf68
BCP: 1980115536

SAP/openui5,SAP/openui5,SAP/openui5,SAP/openui5