Wrong redirect_uri for ORCID authentication

[AndreaBarbasso]

Describe the bug

The redirect_uri sent to ORCID has two forward slashes after the base URL. This is handled gracefully by the Angular router, but could lead to other issues in the future.

To Reproduce

Steps to reproduce the behavior:

1. Go to the sandbox environment;
2. Login as administrator and go to the profile page;
3. Click on View, then Open ORCID settings page in the context menu;
4. Click Connect to ORCID ID;
5. Note that the redirect_uri queryParam has two forward slashes (%2F) right after the base URL: &redirect_uri=https:%2F%2Fsandbox.dspace.org%2F%2Fentities%2Fperson%2Fb5939462-34f8-471f-ab79-8b93f1e82948%2Forcid.

Expected behavior

There should be only one forward slash there.