### 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
} else if (p_name == "animation_frames_count") {
			r_ret = tile_set_atlas_source->get_tile_animation_frames_count(coords);
			return true;
		} else if (components.size() == 2 && components[0].begins_with("animation_frame_") && components[0].trim_prefix("animation_frame_").is_valid_int()) {
			int frame = components[0].trim_prefix("animation_frame_").to_int();
			if (components[1] == "duration") {
				if (frame < 0 || frame >= tile_set_atlas_source->get_tile_animation_frames_count(coords)) {
					return false;
				}
				r_ret = tile_set_atlas_source->get_tile_animation_frame_duration(coords, frame);
				return true;
			}
		}
	}
	for (const TileSelection &E : tiles) {
		
		
		const Vector2i &coords = E.tile;
		const int &alternative = E.alternative;
		TileData *tile_data = tile_set_atlas_source->get_tile_data(coords, alternative);
		ERR_FAIL_COND_V(!tile_data, false);
		bool valid = false;
		r_ret = tile_data->get(p_name, &valid);
		if (valid) {
			return true;
		}
	}
	return false;
}
void TileSetAtlasSourceEditor::AtlasTileProxyObject::_get_property_list(List<PropertyInfo> *p_list) const {