Add option to unmatch a Matched Run
Matched runs does sometimes match two runs which is not the same route. This may for instance be two runs, where one is running a technical single trail over a hill, where the other is running a gravel road along the foot of the hill. It makes no sense to match these two, and I would like to "unmatch" them. After being unmatched, preceding runs should match only the best match of these two, and thus detect whether I run over the hill or not.