User scopes - Manage scopes

Background

Current situation:

• Integrated has one user list, but multiple channels
• Login to Integrated (backend) is possible for front-end users, a role and firewall configuration is required to protect this

Required situation:

• Split backend and frontend users
• Allow multiple, seperated, frontend user "bags", which can be used on multiple channels
• This will be done with "User scopes"
• A scope can be used on one or more channels for frontend login
• The "Integrated" scope is a special scope: always available (not stored in database) and the scope for log in to Integrated

Requirements

• Add "user scopes" to the database
• Fields: ID and name
• Add a CRUD to edit, like the group edit at: /admin/group/ (only difference is that it is called User scopes instead of Groups and the Roles field is not available
• Add "User scopes" to the Manage menu
• Add a scope "Public" to the datafixtures
• Add Behat tests for CRUD operations. Example: https://github.com/integratedfordevelopers/integrated/blob/0.7/features/group.feature