[AddressBook] don't allow saving a contact without name

[Bill Filler]

Current situation
currently you can save a contact without either a first or last name. It should be required to have at least one otherwise the contact disappears from the list and you can never edit them again.

Desired solution
The 'save' button is disabled if there is no first or last name available. It is enabled if the user has typed a first or last name. The 'cancel' button is always available.

you should also not allow an edit operation that removes both names.

[PS Jenkins bot (ps-jenkins)]

Fix committed into lp:address-book-app at revision 76, scheduled for release in address-book-app, milestone ubuntu-13.07

[Launchpad Janitor (janitor)]

This bug was fixed in the package address-book-app - 0.2+13.10.20130925-0ubuntu1

---------------
address-book-app (0.2+13.10.20130925-0ubuntu1) saucy; urgency=low

  [ Ted Gould ]
  * Adding single instance marker to the desktop file.

  [ Tiago Salem Herrmann ]
  * Do not bind mainview to keyboard, so we dont show the toolbar when
    dismissing the osk. (LP: #1199122)

  [ Renato Araujo Oliveira Filho ]
  * Fixed contact disappear from the list when edited. (LP: #1225132)
  * Removed action button arrow. Used icon theme for phone number
    actions. (LP: #1227224)
  * Paint a orange rectangle when item is selected. (LP: #1228371)
  * Disable save button if the field name is empty. (LP: #1227870)
  * Move list view to new contact after creation. (LP: #1199983)
  * Remove the contact detail if this is empty. (LP: #1227361)

  [ Ubuntu daily release ]
  * Automatic snapshot from revision 79
 -- Ubuntu daily release <email address hidden> Wed, 25 Sep 2013 06:35:24 +0000