With today's update, we decided to split two permissions in order to give you a more fine grained permission system.
The Create/edit models, plugins and customize content navigation bar environment permission has been splitted in two separate ones: Create/edit models and plugins and Customize content navigation bar.
That's the before and after:
The Edit metadata/replace assets permission for assets has received the same treatment, and you can now control the two actions separately:
This change did not alter what your users were already able to do, or not to do. For instance, if an existing role had the ability to "Create/edit models, plugins and customize content navigation bar", the same role is now be able to "Create/edit models and plugins" and "Customize content navigation bar".