Add existing item form in Hierarchy widget doesn't reset state when removing invalid items
Summary
While adding existing items to Hierarchy widget, if submission fails due to backend error, we show an error message with exact root-cause, if we try to address the problem, it doesn't remove the error (i.e. reset form state), and only way to add items is by canceling the form and opening it again, this makes verbose error message not so useful as user is still being forced to close to form without doing anything, see the attached screen recording;
Edited by Kushal Pandya