chore(models): fill verbose_name to most models.

[954-Ivory]

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Checklist

• I have double checked that there are no unrelated changes in this pull request (old patches, accidental config files, etc.)

Pull Request type

Please check the type of change your PR introduces:

• Other (please describe): Fill verbose_name to most models.

[codecov]

Codecov Report

Merging #314 (daea71b) into master (818ded9) will not change coverage.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##           master     #314   +/-   ##
=======================================
  Coverage   90.14%   90.14%           
=======================================
  Files          22       22           
  Lines         771      771           
  Branches      138      138           
=======================================
  Hits          695      695           
  Misses         52       52           
  Partials       24       24           

Impacted Files	Coverage Δ
eav/models.py	97.41% <100.00%> (ø)

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[Dresdn]

Thank you @954-Ivory