How to disable rich text WYSIWYG editor on case description?

Found the solution:

  1. Create file at custom/Extension/modules/Cases/Ext/Vardefs/customizations.php
  2. Add following lines (note I disabled TinyMCE on both description and updates)
    unset($dictionary[‘Case’][‘fields’][‘description’][‘editor’]);
    unset($dictionary[‘Case’][‘fields’][‘update_text’][‘editor’]);
  3. Do a “quick repair and rebuild”
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