Refactored `View` class to ensure `SuperView.SubViewNeedsDraw`
is managed correctly. Added logic to prevent clearing the flag
prematurely when sibling subviews still require drawing.
Introduced a new `SubViewNeedsDraw` property with a private
setter and added `TODO` comments for potential future
improvements, such as making it a computed property.
Updated and added tests in `NeedsDrawTests` and `StaticDrawTests`
to validate the corrected behavior and prevent regressions.
Re-enabled a previously skipped test after fixing the related bug.
Refactored `NeedsDraw` logic into a modular implementation in `View.NeedsDraw.cs`, introducing methods to manage drawing states more effectively. Updated `Menus.cs` event handlers to include null checks for robustness. Improved margin drawing logic in `Margin.cs` with better performance and debugging assertions.
Added comprehensive unit tests in `NeedsDrawTests.cs` and `StaticDrawTests.cs` to validate the new drawing logic, including edge cases and static `View.Draw` behavior. Removed redundant tests from `ViewDrawingFlowTests.cs`.
Refactored diagnostic flags handling in `UICatalogRunnable.cs` for clarity. Performed general code cleanup, leveraging modern C# features and improving maintainability.
