Replacing workflow start validators via Customize-Annotation leads to startup errors of Studio-Server

Fixed a bug, where replacing a workflow validator via Customize-Annotation failed because the replacing validator bean could not be found by the original name of the replaced bean.

Updated documentation on how replacement via customizer works and its side effects. See 'Content Application Developer Manual' section 'Customizer'

(CMS-28777)

CKEditor5: Link-Balloon layout issue has been fixed

A layout issue where the content-link button would take too much space and move the "Insert/Update" button out of the balloon (especially with German language) has been fixed.

(CMS-28685)