For the subscriptions on nodes (folders in Kmelia for example), take into account the move of nodes. In the case the node is move into another component instance, then any subscriptions on that node are renewed on the node.
In order to do this, add the notification on nodes move.
In a form, a publication picker field is rendered as text in read-only mode. the TextDisplayer used for doing encodes the value for HTML for any fields other than file and date field. Hence the bug with publication URL fields. So the fix is avoid the HTML encoding for such type of fields. (Publication URLs field are the read-only rendering of publications picker fiel.d)
Now, in the WYSIWYG editor, for the image insertion or update, only images of a given MIME type are allowed (those supported by our current CKEditor version: jpeg, gif, webp, and png)