Add an option for displaying only available classes that can be registered
If validate-available-classes-listener introduced in https://gitlab.com/universis/universis-api-private/merge_requests/97 is enabled, student can filter available classes based on validation results.
Note: Use /api/diagnostics/services to check if ValidateAvailableClassesAction
service is available.
Edited by Kyriakos Barbounakis