[forms] Add autocomplete attribute for formrenderers If you set form.autocomplete = False, the form renderer in the open form tag will add the html option 'autocomplete=off'. It allows to disable the functionality of some browsers to fill in some forms automatically (for instance a profile with login/password) Closes #3747294

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if not rql('CWConstraintType X WHERE X name "RQLUniqueConstraint"',

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           ask_confirm=False):

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    rql('INSERT CWConstraintType X: X name "RQLUniqueConstraint"',

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        ask_confirm=False)