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Assertion on closing codeblocks due to wxWidgets 3.3

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christo:
There is a regression in wxWidgets causing assertion window on closing codeblocks if the project tree is expanded and is big.


--- Code: ---../src/generic/treectlg.cpp(1539): assert "IsVisible(item)" failed in GetNextVisible(): this item itself should be visible
--- End code ---

I've reported it to wxWidgets project and fix is identified. https://github.com/wxWidgets/wxWidgets/issues/26839

Miguel Gimenez:
There is a similar issue, see wxTreeCtrl::GetFirstVisibleItem() returns invisible item on MSW if the tree is hidden. I added an item visibility check to avoid an assertion when the project tree was hidden on project loading.

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