fix(out_base): update 3D variant aspect matching logic

- Correct logic to select default 3D slot selection (added
  `any_matched`);
- Renamed `default` to `default_slots` for clarity.

Author: mdeweerd

kibot/out_base.py

@@ -758,13 +758,14 @@ def apply_3D_variant_aspect(self, board, enable=False):
                                 logger.debug(f" - Variant specific: {text}")
                             var = match.group(1)
                             slots = match.group(2).split(',') if match.group(2) else []
+
                             # Do the match
                             matched = self.variant.matches_variant(var)
                             if matched:
                                 self.apply_list_of_3D_models(enable, slots, m, var)
                                 break
             if not matched and default is not None:
-                self.apply_list_of_3D_models(enable, slots, m, '_default_')
+                self.apply_list_of_3D_models(enable, default, m, '_default_')
 
     def create_3D_highlight_file(self):
         if self._highlight_3D_file: