I should be able to instantiate this App from its Help pages

(User Story, Closed -> Fixed, Priority: Critical, Test Status: No automated tests yet , Reported By Justin du Coeur, )
Apps
Summary: Currently, you can only create an App from the Info page. But from a workflow POV, I want to be able to do this elsewhere.
For the moment, I'm doing a quick-and-dirty version of this: any control with the class "_instantiateAppButton" gains an onClick handler so that clicking it shows the Create Space Dialog.
Eventually, we will likely want to be able to instantiate other Apps from a Help page (in particular, for Querki tutorials), but I need to think about the security ramifications. I suspect that, at least, we need to show more details in the Create Space Dialog, to avoid spoofing. For now, just instantiating this App is sufficient for the LARP App use case I have right now.