Cannot add more fields to a contact.

[freya zhang]

Information:
current build number: 331
device name: krillin
channel: ubuntu-touch/rc-proposed/bq-aquaris.en
last update: 2016-05-12 12:57:13
version version: 331
version ubuntu: 20160512
version device: 20160329-a9bacdb
version custom: 20160505-975-38-9

Precondition:
Contacts are saved in address book.

Steps:
1.Launch Contacts app and click on a contact
3.Click the "Edit Contact" button.
4.Click on "Add field" and select "Phone","Email" or "Address" option.Check the performance.

Actual Result: Nothing happens.
Expected result: Add email, phone, address field should appear.