### 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
continue;
			}
			const String &property_string = E_property->get().name;
			if (!tile_data->is_allowing_transform() && (property_string == "flip_h" || property_string == "flip_v" || property_string == "transpose")) {
				continue;
			}
			if (!counts.has(property_string)) {
				counts[property_string] = 1;
			} else {
				counts[property_string] += 1;
			}
			PropertyInfo stored_property_info = E_property->get();
			stored_property_info.usage |= PROPERTY_USAGE_STORAGE; 
			PropertyId id = { counts[property_string], property_string };
			if (!usage.has(id)) {
				usage[id] = { 1, stored_property_info };
				data_list.push_back(&usage[id]);
			} else if (usage[id].property_info == stored_property_info) {
				usage[id].uses += 1;
			}
		}
	}
	
	for (const PLData *E : data_list) {
		if (E->uses == tiles.size()) {
			p_list->push_back(E->property_info);
		}
	}
}
void TileSetAtlasSourceEditor::AtlasTileProxyObject::edit(Ref<TileSetAtlasSource> p_tile_set_atlas_source, RBSet<TileSelection> p_tiles) {