Assign the project manager title to the node instead of DisplayServer

[mdelorme]

Fixes #100727

Project Manager title is directly given to the DisplayServer at initialization.

With the changes of ff6eea5 auto-translation triggers the renaming of the window and leading to the bug since the title attribute of the scene root was not defined.

This fix gives the title to the root of the SceneTree which solves the problem.

[timothyqiu]

The title is now Godot Engine - Project Manager (DEBUG).

The main window's title always has this (DEBUG) suffix for debug builds. The same goes for official builds too since debugging features are enabled when compiling the editor.

I think that's why the title was set on DisplayServer instead of Window.

[mdelorme]

I'm sorry, is that not wanted behavior ?
Should we aim for Godot Engine - Project Manager without the (DEBUG) even in debug builds ?

[timothyqiu]

Should we aim for Godot Engine - Project Manager without the (DEBUG) even in debug builds ?

Yes. That's the previous behavior. Editor builds always define DEBUG_ENABLED macro.

[mdelorme]

@timothyqiu I proposed a fix, can you tell me if that sounds correct to you. If that's ok, I'll squash everything.

[timothyqiu]

Works as expected.

[mdelorme]

I have added a comment on excluding the project manager for the (DEBUG) suffix and I've included the fix to set_title so that everything is done correctly everywhere.

[Repiteo]

Thanks!