Fix: wizard: it could be entered empty values for 'salt' and 'passwd'
Fix: wizard: it could be entered empty values for 'salt' and 'passwd'

blaurent49/duniter,blaurent49/duniter,duniter/duniter,blaurent49/duniter,duniter/duniter,duniter/duniter,duniter/duniter,blaurent49/duniter,duniter/duniter,duniter/duniter