GUI: Register: form
GUI: Register: validation - wip
GUI: Register: validation - calling the notification service
GUI: Register: validation - with notification
GUI: Register: sending - wip
GUI: Init: stays on the same page on refresh whenever possible
GUI: Removes any notification on route change
GUI: General HTTP error messages
UI: added missing error messages
UI: redirection for the registration
UI: error handling at token validation server side
GUI: registration: result page