title: Round off a numeric field into 2 decimal places but save the value into DB that is not rounded off using EXTJS MVVM Databinding
body: <p>How can I round off a numeric field into 2 decimal places and save the value
  that is not rounded off into database. I just want the display to have 2 decimals rounded off but the editing mode should accept multiple decimals and save into DB as is. Using EXTJS MVVM Databinding</p>