Allow to exclude some documents having specific XObjects from the automated glossary transformations

Since GLOSSARY-32, it is possible to ask the Glossary app to scan for any terms within the documents of a wiki to look for glossary entries, and then to replace these entries with a Glossary Macro.

We discovered however that this can cause issues to some page contents. For example, the Diagram application uses the document content to store the contents of its diagram, and if glossary references are added to this diagram content, they will make the text englobed by the glossary reference macros disappear.

This ticket aims to provide a configuration option to disable the glossary transformation for pages who have an XObject of a given class.