### 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
TileSetAtlasSourceEditor::AtlasTileProxyObject *atlas_tile_proxy_object = Object::cast_to<TileSetAtlasSourceEditor::AtlasTileProxyObject>(get_edited_object());
	ERR_FAIL_COND(!atlas_tile_proxy_object);
	ERR_FAIL_COND(atlas_tile_proxy_object->get_edited_tiles().is_empty());
	Ref<TileSetAtlasSource> tile_set_atlas_source = atlas_tile_proxy_object->get_edited_tile_set_atlas_source();
	generic_tile_polygon_editor->set_tile_set(Ref<TileSet>(tile_set_atlas_source->get_tile_set()));
	
	Vector2i coords = atlas_tile_proxy_object->get_edited_tiles().front()->get().tile;
	int alternative = atlas_tile_proxy_object->get_edited_tiles().front()->get().alternative;
	TileData *tile_data = tile_set_atlas_source->get_tile_data(coords, alternative);
	generic_tile_polygon_editor->set_background(tile_set_atlas_source->get_texture(), tile_set_atlas_source->get_tile_texture_region(coords), tile_data->get_texture_origin(), tile_data->get_flip_h(), tile_data->get_flip_v(), tile_data->get_transpose(), tile_data->get_modulate());
	
	generic_tile_polygon_editor->clear_polygons();
	if (String(count_property).is_empty()) {
		if (base_type == "OccluderPolygon2D") {
			
			Ref<OccluderPolygon2D> occluder = get_edited_property_value();
			generic_tile_polygon_editor->clear_polygons();
			if (occluder.is_valid()) {
				generic_tile_polygon_editor->add_polygon(occluder->get_polygon());
			}
		} else if (base_type == "NavigationPolygon") {
			
			Ref<NavigationPolygon> navigation_polygon = get_edited_property_value();
			generic_tile_polygon_editor->clear_polygons();