[CMS-6185] in document type editor, it is impossible to delete classifiable and taggable once added - Issues

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open CMS
in browse perspective, in configuration, in hippogogreen namespace, add a new type, inherit from "product"
open mixins, add classifiable and taggable

after adding these mxins, it is not possible to delete them afterwards, it is still possible to add and delete primitive fields

causes

CMS-6872 As a developer I would like to determine while editing a compound/document type if it has been committed or not

relates to

CMS-6892 As a developer I don't want the RenderPluginEditorPlugin#validateDelete to do any logic other than returning false