Core: Fix group validation with 3 and more fields
Core: Fix group validation with 3 and more fields

If a previous element is already invalid, the the check of the current element
is never done and the current element becomes always valid.

Closes #1816, #1805.

Arkni/jquery-validation,alfonsomartinde/jquery-validation,jzaefferer/jquery-validation,alfonsomartinde/jquery-validation,jquery-validation/jquery-validation,RobJohnston/jquery-validation,staabm/jquery-validation,alfonsomartinde/jquery-validation,jzaefferer/jquery-validation,jzaefferer/jquery-validation,staabm/jquery-validation,MeteorAdminz/jquery-validation,MeteorAdminz/jquery-validation,Arkni/jquery-validation,jquery-validation/jquery-validation,RobJohnston/jquery-validation