### Godot version

4.1 dev3

### System information

W10

### Issue description

The button is pushed to the far right. Maybe it tries to escape, idk.

![image](https://github.com/godotengine/godot/assets/2223172/becb32f6-f725-4564-952e-946ec544c376)

It used to be more to the left. Not sure when it changed.

Seems correct in 4.0.3

![image](https://github.com/godotengine/godot/assets/2223172/3e3d206a-481d-415a-acb4-40cbf4a60fc0)


### Steps to reproduce

1. Add TileMap
2. Look to the right

### Minimal reproduction project

N/A
panner->set_callbacks(callable_mp(this, &TileAtlasView::_pan_callback), callable_mp(this, &TileAtlasView::_zoom_callback));
	panner->set_enable_rmb(true);
	center_container = memnew(CenterContainer);
	center_container->set_mouse_filter(Control::MOUSE_FILTER_IGNORE);
	center_container->set_anchors_preset(Control::PRESET_CENTER);
	center_container->connect("gui_input", callable_mp(this, &TileAtlasView::gui_input));
	center_container->connect("focus_exited", callable_mp(panner.ptr(), &ViewPanner::release_pan_key));
	center_container->set_focus_mode(FOCUS_CLICK);
	panel->add_child(center_container);
	missing_source_label = memnew(Label);
	missing_source_label->set_text(TTR("No atlas source with a valid texture selected."));
	center_container->add_child(missing_source_label);
	margin_container = memnew(MarginContainer);
	margin_container->set_mouse_filter(Control::MOUSE_FILTER_IGNORE);
	center_container->add_child(margin_container);
	hbox = memnew(HBoxContainer);
	hbox->set_mouse_filter(Control::MOUSE_FILTER_IGNORE);
	hbox->add_theme_constant_override("separation", 10);
	hbox->hide();
	margin_container->add_child(hbox);
	VBoxContainer *left_vbox = memnew(VBoxContainer);
	left_vbox->set_mouse_filter(Control::MOUSE_FILTER_IGNORE);
	hbox->add_child(left_vbox);
	VBoxContainer *right_vbox = memnew(VBoxContainer);
	right_vbox->set_mouse_filter(Control::MOUSE_FILTER_IGNORE);
	hbox->add_child(right_vbox);
	
	Label *base_tile_label = memnew(Label);
	base_tile_label->set_mouse_filter(Control::MOUSE_FILTER_PASS);
	base_tile_label->set_text(TTR("Base Tiles"));