TreeView drag and drop is incorrect when dragging a parent directly below itself

Steps to reproduce:

1. Add the TestWindow.cs script in a project

2. Open Window -> TestWindow

3. Try reordering a parent directly under itself (ID 6) and check the arguments at the top of the window.

Actual results: The childIndex is 0, which is incorrect.

Expected results: The childIndex should be 3, to insert between ID 10 and ID 11.

 

Additional Note: The drag bar should be a bit more to the left.

 

Reproducible with versions: 6000.0.20f1

Not reproducible with versions: -

Can’t test with versions: -

Tested on (OS): MacOS

Notes:

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