### Godot version

4.1.dev 2e273f0e35800f2bcc7c05db54100caa97928f69

### System information

macOS 13.4

### Issue description

Removing a SpinBox from the node tree using `remove_child` during the line edit text submit signal will crash the engine.

```
handle_crash: Program crashed with signal 11
Engine version: Godot Engine v4.1.dev.custom_build (2e273f0e35800f2bcc7c05db54100caa97928f69)
Dumping the backtrace. Please include this when reporting the bug to the project developer.
[1] 1   libsystem_platform.dylib            0x0000000183b5aa24 _sigtramp + 56
[2] Viewport::gui_get_focus_owner() (in godot.macos.editor.arm64) + 32
[3] SpinBox::_line_edit_focus_exit() (in godot.macos.editor.arm64) + 28
[4] CallQueue::_call_function(Callable const&, Variant const*, int, bool) (in godot.macos.editor.arm64) + 336
[5] CallQueue::flush() (in godot.macos.editor.arm64) + 908
[6] SceneTree::physics_process(double) (in godot.macos.editor.arm64) + 244
[7] Main::iteration() (in godot.macos.editor.arm64) + 528
```

### Steps to reproduce

Open the minimal reproduction project, click on the SpinBox, press enter, and the engine crashes.

### Minimal reproduction project

[SpinBoxTextSubmitCrash.zip](https://github.com/godotengine/godot/files/11631081/SpinBoxTextSubmitCrash.zip)

if (!gui.tooltip_control) {
		return;
	}
	
	Control *tooltip_owner = nullptr;
	String tooltip_text = _gui_get_tooltip(
			gui.tooltip_control,
			gui.tooltip_control->get_global_transform().xform_inv(gui.last_mouse_pos),
			&tooltip_owner);
	tooltip_text = tooltip_text.strip_edges();
	if (tooltip_text.is_empty()) {
		return; 
	}
	
	if (gui.tooltip_popup) {
		memdelete(gui.tooltip_popup);
	}
	if (!tooltip_owner) {
		return;
	}
	
	PopupPanel *panel = memnew(PopupPanel);