isDirty return false for update nested-nested array items

[riceyeh]

The following example shows updating to nested-nested array items does not make isDirty return true for the updated nested array item.

describe('add nested array items', () => {
it('', () => {
const fields = [
'pricing',
'pricing.value[]',
'pricing.value[].prices[]',
'pricing.value[].prices[].money',
'pricing.value[].prices[].quantity',
];

const values = {
  pricing: {
    value: [
      {
        prices: [{
          money: 35,
          quantity: 1
        }]
      }
    ]
  }
};
const $999 = new Form({fields, values}, {name: 'Form 999'})
console.debug('pricing.value.0.initial', $999.$('pricing.value.0').initial)
  console.debug('pricing.value.0.prices.initial', $999.$('pricing.value.0.prices').initial)
$999.update({
  pricing: {
    value: [
      {
        prices: [
          {
            money: 35,
            quantity: 1
          },
          {
            money: 100,
            quantity: 3
          }
        ]
      }
    ]
  }
})
console.debug('pricing.value.0.initial', $999.$('pricing.value.0').initial)
console.debug('pricing.value.0.prices.initial', $999.$('pricing.value.0.prices').initial)
expect($999.$('pricing.value').isDirty).to.be.equal(true)
expect($999.$('pricing.value.0').isDirty).to.be.equal(true) //** but return false for now.
expect($999.$('pricing.value.0.prices').isDirty).to.be.equal(true)

})
});