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 }}
