title: ng-model-option rollback changes on whole form
body: <p>have a quick question. </p>
  
  <p>I have a form with whole bunch of fields that could be updated from UI.</p>
  
  <p>I found a directive called "ng-model-option" that seems to be handling those kind of issues. </p>
  
  <p>My question is: is it possible to rollback changes on whole form without specifying <code>ng-model-options="{ updateOn: 'submit'}"</code>
  on every input fieldin my form? </p>
  
  <p>Or, this directive look on every field and only submit those fields that were modified? </p>
  
  <p>Thank you for your help and explanation in advance!</p>