Suppress admin user check for URL handler registration

[HebaruSan]

Problem

In a recent forum thread, a user reported receiving the URL handler registration prompt:

CKAN requires permission to add a handler for ckan:// URLs.

Do you want to allow CKAN to do this? If you click no you won't see this message again.

And after clicking Yes, the admin user error appeared in a new cmd window, while the main GUI process continued normally.

Cause

The URL handler registration intentionally runs ckan.exe gui registerUrl as administrator, which trips the admin user check.

Changes

Now the elevated command line to register the handler includes --asroot to bypass the admin check. This should allow it to finish normally.