Select all / Assign all when creating new topo

[killakalle]

As a frequent topo creator I would like to be able to add all routes at once to a new topo photo so that I don't have to add each route individually.

I think a simple "Select all" / "Deselect all" button would be really cool, probably low effort and would make topo editors super happy. At the moment it's a lot of clicking to add all routes.