Display original share owner in share panel #30394

Steps

1. Create three users "user1", "user2" and "user3"
2. Login as "user1"
3. Create folder "test"
4. Share "test" with "user2"
5. Login as "user2"
6. Share "test" with "user3"
7. Login as "user3"
8. Open share panel for "test"
9. Look at the information provided in the panel

Actual result

Panel shows "user2", the direct sharer.

Expected result

Panel shows not only the direct sharer "user2" but also the original owner "user1" (their display names).

Versions

Observed in 9.0.8, 9.1.7 and stable10

@pmaier1