Both events and event names selectable via menu "Track items". Event names in statusbar selectable in menu "Statusbar". Mouse Right click on highlighted event gives pop message with the contents. Initially all the Activities are shown after loading the route. If that's too much one of the Activities can be selected.
Example:

Number of downloads: 10
I know there is a new Actvity Viewer on it's way on a different Github repository. But I did not wanted to wait and to interfere with that one, so I used the code from the Open Rails Github. It was fun coding anyway.
Any thoughts?