Add support for use of default profile

Current Situation

• The JOC Cockpit Settings page offers the configuration item default_profile that holds the name of the account who's profile is used as a default when new accounts are created. By default the root account is used.
• This feature does not work:
  • for new user accounts the default profile is not considered.
  • for existing user accounts when clicking the "Reset Profile Preferences" button, not the values from the default_profile setting are used but the default values for profiles are used.

Desired Behavior

• The default profile is managed on a per Controller basis. This means an account can have different profile settings depending on the Controller in use, for example to display different themes or menu colors per Controller.
• The authentication web service manages profiles for new user accounts and assigns the default profiles per Controller.
• When clicking the "Reset Profile Preferences",
  • the values of the default profile (indicated by the default_profile setting) are used for all accounts that are different from the account specified by the default_profile setting
  • For the account that is equal to the account specified by the default_profile the default values for profiles are used.