Instead, hidden fields now override the "row" template to not include a label or errors.
The "rest" (former "hidden") helper has been adapted to output any fields that were not
rendered manually. It should usually be called at the end of a form.
Fields are not available in the templates anymore. Instead, all required information can be
accessed through view variables.
Example usage of helpers and variables in a form theme:
// use the label helper
{{ this.label('my label') }}
// use the label variable
{{ this.vars.label }}
{{ label }}
Example usage of helpers and variables in a normal template:
// use the label helper
{{ field.label('my label') }}
// use the label variable
{{ field.vars.label }}
