Fixes #578 - bodyClass fallback to default settings CKEDITOR_SETTINGS

[tuerlefl]

fixed bodyClass fallback to default settings CKEDITOR_SETTINGS

Issue: #578

[NicolaiRidani]

Thx for the PR @tuerlefl much appreciated. I have informed the PR review team in our Slack #workgroup-pr-review to have a look at this.

[codecov]

Codecov Report

Merging #579 (a0d5f8f) into master (606fc86) will not change coverage.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##           master     #579   +/-   ##
=======================================
  Coverage   74.91%   74.91%           
=======================================
  Files          20       20           
  Lines         905      905           
  Branches      128      128           
=======================================
  Hits          678      678           
  Misses        199      199           
  Partials       28       28           

Impacted Files	Coverage Δ
djangocms_text_ckeditor/widgets.py	80.95% <100.00%> (ø)

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