Adding users breaks when popups are disabled in Site Settings

[ralphwilliams]

Adding users to courses is dependent on dnnModal. This library is not included when popups are disabled in Site Settings. This dependency needs to be resolved to work even when popups are disabled.

[WillStrohl]

The Angular has modals too.

[ralphwilliams]

I am copying link for the edit users in role from the admin modules and that uses the dnnModal. I'm not sure how to get it into the right context to use it without dnnModal.