Make ImagingPlane.description optional

[rly]

Motivation

Fix #2049

Checklist

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 92.84%. Comparing base (01d9ab9) to head (ed8965a).

Additional details and impacted files

@@           Coverage Diff           @@
##              dev    #2051   +/-   ##
=======================================
  Coverage   92.84%   92.84%           
=======================================
  Files          28       28           
  Lines        2755     2755           
  Branches      716      716           
=======================================
  Hits         2558     2558           
  Misses        127      127           
  Partials       70       70           

Flag	Coverage Δ
integration	73.72% <ø> (ø)
unit	82.75% <ø> (ø)

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[stephprince]

This is a breaking change since the order of positional arguments was changed, correct?

Would it be better to take the approach that was used in add_electrode to prevent breaking changes until positional arguments are deprecated in the next major release?