When setting datetime as rule on a single text filed datetime format is AAAA-MM-JJ HH:MM. This do not match french datetime display (JJ/MM/AAAA HH:MM).

• Could it be possible to change the display to the french format
• Could we add a guideline to help the user type with the right formalism (we already have this for the date format, but not datetime
• Even better, could we pick the datetime from a calendar widget ?