Add classes to the default FieldView

We should add classes to the default FieldView (in react-form) to indicate fields statues.

Question to figure before implementing: should we use aria- instead? And is all the alternative aria-* relevant for non input elements such a container div? is there a better way to describe this on the DOM?

To the root div of the field

• jafar-field (always exists)
• jafar-required (only if required=true)
• jafar-empty (only if empty=true)
• jafar-disabled (only if disabled=true)
• jafar-invalid (only if invalid=true)
• jafar-dirty (only if dirty=true)

To the div that wraps the component

• jafar-component

To the div that wraps the error

• jafar-error

To the header

• jafar-header

To the div that wraps the label

• jafar-label

To the div that wraps the description

• jafar-description

To the div that wraps the asterisk of the required

• jafar-required-indicator