1. Dealloc now uses the normal dealloc procedure.
* Better because normalisation is quick, O(1).
* More normalisation means inserting into the list is faster.
2. Run sfx frame during the generation of upgrades (which can take an
unbounded amount of time).
* Both of these are required to remove the stuttering.
* It sounds really weird now that it works right :/
- [ ] Changelog updated / no changelog update needed