Update to Django 3.2 + various fixes

[ddabble]

This replaces the automatically generated #362, #363, #364 and #365.

This PR includes a couple of bug fixes:

• Fixed course registration list not updating shown list content (26a86f9fbb7ba36a6a5c9d2625b27c3362886909)
• Fixed course registration list not sorting by the advanced course attribute (8561e4334becb01d2cf1ec89b85738b122964375)

[codecov[bot]]

Codecov Report

Merging #366 (26a86f9) into dev (841cd53) will increase coverage by 0.00%. The diff coverage is 100.00%.

@@           Coverage Diff           @@
##              dev     #366   +/-   ##
=======================================
  Coverage   73.81%   73.82%           
=======================================
  Files         116      116           
  Lines        3609     3610    +1     
=======================================
+ Hits         2664     2665    +1     
  Misses        945      945           

Impacted Files	Coverage Δ
make_queue/urls.py	100.00% <ø> (ø)
groups/admin.py	100.00% <100.00%> (ø)
make_queue/admin.py	88.88% <100.00%> (-0.48%)	:arrow_down:
make_queue/views/admin/course.py	51.31% <100.00%> (+2.00%)	:arrow_up:
makerspace/admin.py	86.66% <100.00%> (ø)

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