Other problems from XWIKI-23740 found while documenting it (checked at xwiki-platform-18.8.0-rc-1):
The Annotations tab and the annotation edit form no longer show the Edit / Delete / Validate buttons: #displayAnnotationToolboxFromReference now renders only in view mode (AnnotationCode.Macros). 18.7.0 had them.
The bubble has no Validate button anymore for annotations stored as comments (XWiki.XWikiComments), it is only kept for custom annotation classes.
The fallback date format dd/MM/yyyy hh:mm is 12-hour without AM/PM, so 15:43 is displayed as 03:43.
Documentation to update once fixed: the Annotations tab paragraphs of Annotation Application and the sentence about deleting from the edit form, removed for now.
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