Add 'use current location' button for static configuration locations

As a user, I want to have a button to use my current location for the input fields of the static configuration location (for both adding & editing them).

Some links:

• https://developer.mozilla.org/de/docs/Web/API/Geolocation_API
• https://vueuse.org/core/usegeolocation/

(Not sure about the support for a smartphone GPS usage. If possible it would be really nice)

I guess in any way we need to add some hint about the accuracy of this functionality (seems to be included in the vueuse lib).