### 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
tile_atlas_view->set_atlas_source(*tile_set, tile_set_atlas_source, tile_set_atlas_source_id);
	
	for (int i = 0; i < alternative_tiles_control->get_child_count(); i++) {
		alternative_tiles_control->get_child(i)->queue_free();
	}
	if (tile_set.is_null()) {
		return;
	} else {
		tile_create_help->set_visible(tools_button_group->get_pressed_button() == tool_setup_atlas_source_button);
	}
	Vector2i pos;
	Vector2 texture_region_base_size = tile_set_atlas_source->get_texture_region_size();
	int texture_region_base_size_min = MIN(texture_region_base_size.x, texture_region_base_size.y);
	for (int i = 0; i < tile_set_atlas_source->get_tiles_count(); i++) {
		Vector2i tile_id = tile_set_atlas_source->get_tile_id(i);
		int alternative_count = tile_set_atlas_source->get_alternative_tiles_count(tile_id);
		if (alternative_count > 1) {
			
			int y_increment = 0;
			pos.x = 0;
			for (int j = 1; j < alternative_count; j++) {
				int alternative_id = tile_set_atlas_source->get_alternative_tile_id(tile_id, j);