Invalid client_id when logging in with Inrupt

[rubensworks]

When attempting to log in with the default Inrupt broker, an Invalid client_id error is thrown.

This is probably because we are not supplying a client id here: https://github.com/comunica/jQuery-Widget.js/blob/master/src/ldf-client-ui.js#L348-L352

Related:

• https://solid.github.io/solid-oidc/#clientids
• https://docs.inrupt.com/developer-tools/api/javascript/solid-client-authn-browser/interfaces/ILoginInputOptions.html#clientid