No photo taken by pressing the dedicated physical button

[ghost]

Device: FP2
Channel: stable
Build: 15.04 r3 (OTA 3)

Steps to reproduce: open the camera app, press the dedicated physical button (on the Fairphone 2, it is located at the right of the phone, below the power button).

Expected behavior: photo saved (same behavior than pressing the camera icon on the screen).

Actual behavior: nothing happens.

[ghost]

[ghost]

See also Add buttons #16

[NeoTheThird]

Support for this button needs to be implemented on a lower level, so this is a duplicate of ubports/ubuntu-touch#33. Thanks for reporting, though :)