TreeView DND leaves items highlighted; NaN in TreeView

[rcoreilly]

Describe the bug

Curiously, the Widget and its parts both have no state flags set, but the parts has a StateLayer of .1 that persists despite my attempt to reset it.

Also I caught the inspector tree disappearing, which I've noticed before. getting a NaN in Size.Actual.Total.X, which results in Pos.Total.X = NaN as well. This happens at the top node and propagates downward.

How to reproduce

this is in Core. hopefully can reproduce in simple views test.

Example code

No response

Relevant output

No response

Platform

macOS