Sliceable and ordered reordering

Codecov Report

Merging #544 into master will decrease coverage by 0.08%. The diff coverage is 0%.

@@            Coverage Diff             @@
##           master     #544      +/-   ##
==========================================
- Coverage   84.44%   84.35%   -0.09%     
==========================================
  Files         209      209              
  Lines       12428    12441      +13     
==========================================
  Hits        10495    10495              
- Misses       1933     1946      +13

Impacted Files	Coverage Δ
...dex/images/management/commands/reorder_polygons.py	0% <0%> (ø)

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merged

mentioned in commit 69ea6932