Fixes bug causing config selectors to fail populating due to 401
Fixes bug causing config selectors to fail populating due to 401

It turns out that the access token only gets automatically added to the
jquery AJAX request if the URL is relative, i.e., does not start with
a leading slash.

Fixes #4.

hlapp/node-red-contrib-wirelesstag,hlapp/node-red-contrib-wirelesstag