Expand form options to support dependent fields

[MikeCarbone]

We need flexibility to discern whether this field is available only on hidden or dependent.

maybe

form: {
  hidden: true 
  // or
  hidden: {
    on_create: true | false,
    on_update: true | false,
    true_if_key_present: ['key1', 'key2'],
    true_if_values: {
      'key1': {
        equals: 2 // only hide the field if this field is equal to this
      }
   }
  }
}

We also need to be able to support strings:

form: {
  label: true 
  // or
  label: {
    on_create: string,
    on_update: string,
    dependent_keys: {
      'key1': {
        equals: 2 // only hide the field if this field is equal to this,
        value: "when key1 has a value of 2 you must bla bla",
        // also support qualifying fields too
        is_present: true | false,
        is_empty: true | false,
      }
   }
  }
}