AR idea: "Make roles explicit"

[stefan-ka]

This issue describes an idea for a new AR (maybe more details needed later).

An AR „Make Roles Explicit“, could change a relationship such as A -> B into A [OHS] -> [CF] B. And A <-> B into A [SK] <-> [SK] B correspondingly.

Variants:

• just generate defaults (as above)
• implement a UI which allows the user to choose the roles to be added