Properly order questions for event registrations

One-sentence description

The additional questions should be displayed in the desired order.

Current behaviour

Currently the symposium has a question wrt talk preference, but the rounds are not ordered increasingly (but seemingly randomly). However, in the back-end, the order fields are set properly.

Expected behaviour

The fields should be displayed in the prescribed order.

Steps to reproduce

  1. Go to https://thalia.nu/admin/events/event/237/change/?next=/events/admin/237/
  2. Observe that the order is as expected.
  3. Go to https://thalia.nu/events/237/registration/ (assuming you've registered)
  4. Observe that the order is disregarded.
Edited by Thom Wiggers
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