GUI: Form validation: general form validation
GUI: Form validation: logging
GUI: Form validation: regexp for the school hourly rate
GUI: Form validation: regexp for the school hourly rate
GUI: Form validation: i18n for the school hourly rate
GUI: Form validation: renamed refForm into refObject in order to avoid confusion with the refForm to come
GUI: Form validation: not relying on form directives any longer
GUI: Form validation: colour
GUI: Form validation: contact
GUI: Form validation: postal address
GUI: Form validation: phone & mobile phone
GUI: Form validation: email
GUI: Form validation: web site
GUI: dialog OK & Cancel (i18n)