Display some indicator in short URLs list that redirect rules have been configured

[acelaya]

Right now, the only way to know if a short URL has redirect rules is to go to the redirect rules section. Add some kind of badge/label/indicator to know there are redirect rules for that short URLs.

This will require loading redirect rules for all the short URLs in the active page, so we could evolve the short url redirect rules reducer to handle a map instead of an instance (like the short URLs detail reducer does now). That way, when visiting the section from the list, we can pull the rules from there, avoiding an extra API call.

If the section is loaded "from scratch", then we load rules from the API (again, like with short URLs details).