@package: FavoriteProfiles

Method: Enqueue plugin scripts

Method: Prevent the instance from being cloned (which would create a second instance of it).

Method: Prevent from being unserialized (which would create a second instance of it).

Method: Gets the instance via lazy initialization (created on first usage).

Method: Constructor.

Method: Handle an ajax request for favoriting/un-favoriting a profile.

Method: Retrieves the link to favorite a profile.

Method: Generates the link to favorite a profile.

Method: Retrieves the current URL with additional query variables.