re #37 make UI compatible with new User controller API
Error and information messages modified - correct error messages from backend are displayed and information messages are translated
Set vacation changed to add vacation
User service uses correct end point to delete calendar
Re #7534 'Profile settings' component connected to the API
Re #7532 'Add vacation component' connected to the api
Re #7494 Components connected to API - except profile settings and add vacation components
Re#7528 Menu items are highlighted with correct default, added 404 page
Re#7527 SnackBar opens if the error occurs
Re #7499 User profile component initialized
Refactor service structure