fix: destroy prebound parts on model drop

Signed-off-by: Schmarni <marnistromer@gmail.com>

src/nodes/drawable/model.rs

@@ -646,7 +646,12 @@ impl ModelAspect for Model {
 }
 impl Drop for Model {
 	fn drop(&mut self) {
-		for p in self.parts.get().iter().flat_map(|v|v.iter()) {
+		for p in self.parts.get().iter().flat_map(|v| v.iter()) {
+			if let Some(node) = p.spatial.node() {
+				node.destroy();
+			}
+		}
+		for p in self.pre_bound_parts.lock().iter() {
 			if let Some(node) = p.spatial.node() {
 				node.destroy();
 			}