right now it's confusing to see a stewardship relationship because it's not obvious who is the steward and who is the stewardee.

possible solutions:

1. the stewardship relationship type explicitly specifies a directionality (source and/or target role) and we draw a single arrow instead of two arrows
2. the controls show both roles in the relationship, as below:

and we allow selecting and unselecting of those role types, which will update the similarly-colored arrows that are shown.

we could probably combine these two approaches, where we let the relationship type specify which role direction should be shown by default and we let the user update that as they wish.