🐛 Fix dry_run in BaseSubmissionController

The `submit_new_batch` method fails when setting `dry_run = True`, as it
attempts to index a `set` which raises a `TypeError`. This issue is fixed
by converting the `set` to a `list`.

aiida_submission_controller/base.py

@@ -182,7 +182,7 @@ def submit_new_batch(self, dry_run=False, sort=False, verbose=False):
         """Submit a new batch of calculations, ensuring less than self.max_concurrent active at the same time."""
         CMDLINE_LOGGER.level = logging.INFO if verbose else logging.WARNING
 
-        extras_to_run = set(self.get_all_extras_to_submit()).difference(self._check_submitted_extras())
+        extras_to_run = list(set(self.get_all_extras_to_submit()).difference(self._check_submitted_extras()))
 
         if sort:
             extras_to_run = sorted(extras_to_run)