### 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
}
		}
		internal_undo_redo->end_force_keep_in_merge_ends();
	}
	TileSetAtlasSourceProxyObject *atlas_source_proxy = Object::cast_to<TileSetAtlasSourceProxyObject>(p_edited);
	if (atlas_source_proxy) {
		Ref<TileSetAtlasSource> atlas_source = atlas_source_proxy->get_edited();
		ERR_FAIL_COND(!atlas_source.is_valid());
		UndoRedo *internal_undo_redo = undo_redo_man->get_history_for_object(atlas_source_proxy).undo_redo;
		internal_undo_redo->start_force_keep_in_merge_ends();
		PackedVector2Array arr;
		if (p_property == "texture") {
			arr = atlas_source->get_tiles_to_be_removed_on_change(p_new_value, atlas_source->get_margins(), atlas_source->get_separation(), atlas_source->get_texture_region_size());
		} else if (p_property == "margins") {
			arr = atlas_source->get_tiles_to_be_removed_on_change(atlas_source->get_texture(), p_new_value, atlas_source->get_separation(), atlas_source->get_texture_region_size());
		} else if (p_property == "separation") {
			arr = atlas_source->get_tiles_to_be_removed_on_change(atlas_source->get_texture(), atlas_source->get_margins(), p_new_value, atlas_source->get_texture_region_size());
		} else if (p_property == "texture_region_size") {
			arr = atlas_source->get_tiles_to_be_removed_on_change(atlas_source->get_texture(), atlas_source->get_margins(), atlas_source->get_separation(), p_new_value);
		}
		if (!arr.is_empty()) {
			
			List<PropertyInfo> properties;
			atlas_source->get_property_list(&properties);
			for (int i = 0; i < arr.size(); i++) {
				Vector2i coords = arr[i];
				String prefix = vformat("%d:%d/", coords.x, coords.y);
				for (PropertyInfo pi : properties) {
					if (pi.name.begins_with(prefix)) {
						ADD_UNDO(atlas_source_proxy, pi.name);