R1:addc2c876471

Determine unread count correctly when rendering notification panel

Summary:
Currently, when rendering the panel we count the number of unread notifications in the last 15, but this means we can never render a number larger than 15. If the user has more unread notifications than that, or unread notifications older than the most recent 15, there will be a flash of the higher number and then it will update to the lower number afterward.

Instead, count all unread notifications. This uses the same method used…