Clean up editor tools when entering play mode

[boxrocket6803]

When entering play mode editor tools would stop updating but wouldn't be deleted, leaving them in a non-functional state taking up space on the screen (specifically camera preview and the particle controls). This disposes of editor tools when entering play mode so any connected widgets can be properly removed. Upon exiting play mode or ejecting the editor tools reappear.

[Copilot]

Pull request overview

This PR addresses a bug where editor tools (camera preview and particle controls) would remain visible but non-functional when entering play mode. The fix introduces a cleanup mechanism to properly dispose of editor tools when entering play mode, with tools reappearing when exiting play mode or ejecting.

Changes:

• Added a ClearScreen() method to EditorToolManager that disposes of all component tools and resets internal state
• Integrated the cleanup by calling ClearScreen() when transitioning to game view and when possessing the game

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 2 comments.

File	Description
game/addons/tools/Code/Scene/Tools/EditorToolManager.cs	Implements the ClearScreen() method to dispose of editor tools and clear state
game/addons/tools/Code/Scene/SceneView/SceneViewportWidget.Game.cs	Calls ClearScreen() during game view transitions to clean up editor tools

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[Copilot]

The clearing of ComponentTools after disposing could leave the collection in an inconsistent state if any Dispose() call throws an exception. Consider wrapping the disposal in a try-catch block or using a finally block to ensure ComponentTools.Clear() always executes.

Suggested change

	foreach ( var tool in ComponentTools )
	tool?.Dispose();
	ComponentTools.Clear();
	previousHash = -1;
	try
	{
	foreach ( var tool in ComponentTools )
	{
	tool?.Dispose();
	}
	}
	finally
	{
	ComponentTools.Clear();
	previousHash = -1;
	}

[boxrocket6803]

dispose is used similarly elsewhere in same file, dispose doesn't have any good reason to be throwing exceptions, wont cause any lasting damage if component tools doesnt get cleared. Doesn't seem like something to lose sleep over.

[sboxbot]

This PR has been merged upstream.