Self-Assignment of Actor in the Hierarchy View Crash

[Synyproxy]

Description
2 Bugs behaviors around the same issue: Self Asignment of Actor in the Hiearchy view Crash

To Reproduce

1. Try Attach a child Actor to itself
2. Crash

To Reproduce

1. Try Attach a root Actor to itself
2. It will be child of Actor bellow

OvEditor_9uJbKABEZK.mp4

[adriengivry]

Cannot seem to reproduce since #446