Hello

Both Tree and Listbox have the same problem.
Whe you build a tree/listbox with some sizable columns, then you move the columns, sizing is ok and both headers and content is aligned as you move the columns.
When you double click between column headers instead, you'd expect the columns to be auto-sized.
That is not, in fact the headers and the content is resized in different weight so that the content is misaligned from the headers.

Please fix, or let me know if further tests or information has to be provided.
Thank you
Best regards
Gianluca Bonetti