745fd2a2cb58e40337310c28ab1cf4a418335d0c
Since660867fa00, having tree-view items uncollapsed by default using the `set_collapsed()` functions wouldn't work anymore. An attempt to do this would assert even, soeb71d9f7bcdisabled the assert. I think a function designed to handle exactly this is the best solution, it makes the intent & behavior more clear than before, and highlights that this is a special case. Mitigates #117957, in that it solves the regression, but tree-views still don't remember their state on screen-layout changes. This is a known limitation and not supported. Pull Request: https://projects.blender.org/blender/blender/pulls/119166
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