Persist Tree Navigation Mode Across Sessions

[OlegMoshkovich]

When a user selects a navigation mode in the tree (either "Spatial Structure" or "Element Type"), this choice does not currently persist when the tree is closed and reopened. Users expect their last selection to be remembered and applied automatically upon reopening the tree.

This enhancement would improve user experience by reducing the need to repeatedly set the preferred navigation mode during regular use.

Steps to Reproduce

• Open the tree view in the application.
• Change the navigation mode to either "Spatial Structure" or "Element Type".
• Close the tree view.
• Reopen the tree view.

Expected Behavior

Upon reopening, the tree should display in the last navigation mode selected (either "Spatial Structure" or "Element Type").

Actual Behavior

The tree resets to a default navigation mode every time it is reopened, disregarding the user's previous selection.