Updated for the OpenCms 15 release.
- workplace: documented the login with two-factor authentication
- workplace: documented the (image) galleries dialogs and tools
- template variants: documented the usage of sitemap attributes
- template development: documented the schema versioning mechanism
- advanced direct editing: restrict write permissions for sitemap configuration files
- advanced direct editing: hide content types in the add contents menu if not droppable
- lists: introducing the new <cms:enable-list-add> tag
- widget configuration: date-picker widget can select date only with fixed time