Report editing after creation

[mmannings]

Is your feature request related to a problem? Please describe.
To streamline the process of new report creation, when data are similar to the existing one. It would be good to have the functionality to edit report after it was created.

Describe the solution you'd like
I think, I oversee currently the easiest one, where report the new report overwrites the old one (edited report becomes a new one and an old one is deleted).

Describe alternatives you've considered
Not sure of any, since by now we don't have a function to update an existing report.

CC @tawahle @bkampe @hauschke