Extend dependencies on custom roadmaps

What is the challenge?

The existing functionality for showing dependencies in custom roadmaps only works for "depends" but not other relationships

What is the impact?

If we want to visualise dependencies on custom roadmaps, we can only select either one of the "depends" options, when in reality we would be using one of the other types of relationships just as much, but those won't appear.

Describe your idea

Make all types of dependencies visible in the custom roadmaps.