Notifications for Activities and More

Hi,

I would like to propose to enhance the notification functions for repeat notification and notification definition of activities and more notifiable elements to be made possible. This function is useful to set automatic reminders at custom frequency/trigger rule to activity/item related persons for example, until an activity is completed. 

Currently, I noticed that the list available for notifiable item is limited and would like to suggest to include more items which require follow-up or to be completed in certain date, such as activities, milestones, timesheet, test cases and sessions, decisions, questions, product version, project KPI status etc.  

Appreciated if this could be made available. Thanks!

Cheers,
Rainbow