Add number of extension installations to extension manager

@brhoom Does this match behavior that you are aware of? Has your increase of this extension gone up since May?

I think the extension has some issues with Slicer 4.11. I already added many new functionalities and I am planning to update the extension soon.

I don’t see why not, as long as the users were informed of it. We’d need to be sure to follow best practices about opting in and so forth. @muratmaga and I had discussed and prototyped a “SlicerAnalytics” module that observed Slicer activity and reported back to google analytics but didn’t take it very far. It wasn’t clear how much to report and google analytics is probably not the right server but in principle it could be done.