### Godot version

v4.2.dev3.official [013e8e3af]

### System information

Windows 11, Core i5-12400F, RX 6600

### Issue description

TileSet->Setup->Separation maybe should have "px" like rest?
![Screenshot 2023-08-21 162202](https://github.com/godotengine/godot/assets/962340/3c6b9a97-7520-4610-8153-7882cc9c303f)
I know this is pixels from testing it.

TileSet->Select is this Animation Separation "px" too? idk
![Screenshot 2023-08-21 162131](https://github.com/godotengine/godot/assets/962340/fcb580e3-9ff7-41d8-92d3-e585841d3803)
I tried setting up animation separation and got a not enough room error, so maybe not "px". idk


Thanks.


### Steps to reproduce

- open TileSet->Setup->Separation, note some have "px" and one doesn't
- open TileSet->Select, is this separation "px" too?


### Minimal reproduction project

n/a
current_tile_data_editor = nullptr;
	}
	
	if (current_tile_data_editor) {
		current_tile_data_editor_toolbar = current_tile_data_editor->get_toolbar();
		current_property = property;
		current_tile_data_editor->set_visible(tools_button_group->get_pressed_button() == tool_paint_button);
		current_tile_data_editor_toolbar->set_visible(tools_button_group->get_pressed_button() == tool_paint_button);
	}
}
void TileSetAtlasSourceEditor::_tile_data_editor_dropdown_button_draw() {
	if (!has_theme_icon(SNAME("arrow"), SNAME("OptionButton"))) {
		return;
	}
	RID ci = tile_data_editor_dropdown_button->get_canvas_item();
	Ref<Texture2D> arrow = Control::get_theme_icon(SNAME("arrow"), SNAME("OptionButton"));
	Color clr = Color(1, 1, 1);
	if (get_theme_constant(SNAME("modulate_arrow"))) {
		switch (tile_data_editor_dropdown_button->get_draw_mode()) {
			case BaseButton::DRAW_PRESSED:
				clr = get_theme_color(SNAME("font_pressed_color"));
				break;
			case BaseButton::DRAW_HOVER:
				clr = get_theme_color(SNAME("font_hover_color"));
				break;
			case BaseButton::DRAW_DISABLED:
				clr = get_theme_color(SNAME("font_disabled_color"));
				break;
			default:
				if (tile_data_editor_dropdown_button->has_focus()) {