[phone-app] press-call-twice-to-redial doesn't work

Still present on utopic image 2.

Same behavior in Utopic 140.

Recent calls can be redialed by dragging up the "Recent" tab from the bottom then selecting a number, but it'd be nice to have a shortcut attached to the call button when no number is entered (one press would populate the number area with the last-dialed number, another press would start the call).

need guidance from design here

If we want to allow this feature, the call button in the dialer has to be enabled all the time, even if the number input field is empty.
A tap on the call button would pre-populate the number input field with the last dialed number and user would have to tap again to place the call.

Currently the call button is disabled because we want to avoid calls being placed by mistake if user invokes the bottom edge swipe. So, my only concern is how likely it will be that calls are placed by mistake if we allow the "press-call-twice-to-redial" functionality.

I agree with the impracticality of not having an easier way to redial after hitting the voice mail, and new customers are requesting this feature too. Maybe a button to repopulate the input field and spare one tap?
Right now it takes 3 gestures to redial: swipe up, pick the number, hit the dial button. Could we at least have a button to hijack the first two steps, and then be able to just press call?

This also affects: https://bugs.launchpad.net/dialer-app/+bug/1452772

This bug was fixed in the package dialer-app - 0.1+15.10.20150810-0ubuntu1

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dialer-app (0.1+15.10.20150810-0ubuntu1) wily; urgency=medium

  [ CI Train Bot ]
  * Resync trunk.

  [ Tiago Salem Herrmann ]
  * Improve emergency number validation with libphonenumber. (LP:
    #1444883, #1334860, #1308365)

 -- CI Train Bot <email address hidden> Mon, 10 Aug 2015 21:06:08 +0000

Tested on arale 15.04 (r85)