I think we should show all external links (URL) with dates (MBS-7346) and pending statuses (
MBS-7345) in sidebars — and also favicon(s), but maybe not (MBS-7347).
This for all entities with such external URLs.
Currently there is a white-list of showed relationships.
The addition or removal of items in this list is always source of time consuming and always renewed discussions, with no identified aim (even the artists I've seen with huge URL lists in the sidebar looks OK).
And realtionships not in the white list, I think are not there, I try to add, loose time, then it says it's already there, blocking the edit.