Change input widget to 'number' and use a maximum value for 'messages_time_window' that can be validated in the browser. Bump version number, and add dependency to the 'acs-templating' version providing with the new 'number' widget
Chat reform: - use consistently package_id to model belonging of a chat object to a particular package instead of the context_id - set context_id to the package_id, as was already the case in practice, for permission checking - make sure package_id exists and set it to the context_id in case it doesn't to handle legacy installations