Add link field to missing metrics metric

[Sebastiaan127001]

Is your feature request related to a problem? Please describe.
I'm always frustrated when I cannot click on links in the entities tab because it points to the API URL of Quality-time. For specific situations, depending on the infrastructure, the collector uses a different URL than the browser.

Describe the solution you'd like
A extra field to enter the 'Interface (GUI) Link' / 'Human Readable Link' (consistent naming with other metrics)

Additional context