26.7.20260710

• SECURITY: this release fixes multiple high level security vulnerabilities, everyone is strongly adviced to update to it!
• All apps: inserting a new custom-fields between or before existing ones removes most data from the existing fields
• Calendar/Mail: fix applying an external organizers update did loose the recurrence end-date
• Mail: display title no longer shows "mail-display" prefix
• Mail: fix access check in mail_hooks access method
• Invoices: OCR import now identifies document type (invoice, credit note, ...) and billing period