Allow selectors to be out of order (fixes #433)

[codecov[bot]]

Codecov Report

Merging #434 into main will not change coverage. The diff coverage is n/a.

@@           Coverage Diff           @@
##             main     #434   +/-   ##
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  Coverage   76.29%   76.29%           
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  Files          21       21           
  Lines        2320     2320           
  Branches      480      480           
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  Hits         1770     1770           
  Misses        410      410           
  Partials      140      140           

[connorcoley]

I don't believe so, no. It's not an issue for programmatic definition, and I when reviewing templated enumerations, I looked at the pbtxt in a text editor, not as loaded onto the form