Add a button to permantently get next random image

[Karl-Philipp Richter]

Currently it's only possible to get the next random image with the menuitem or the keyboard shortcut <kbd>Ctrl</kbd>+<kbd>M</kbd>. It'd be nice to have a trigger button which changes the function of the next image button to get the next random image and the go back button to get the last shown image. It's not so nice to have to click twice to achieve that with the menu item.

ProblemType: Bug
DistroRelease: Ubuntu 15.04
Package: eog 3.14.4-1
Uname: Linux 4.1.4-040104-generic x86_64
ApportVersion: 2.17.2-0ubuntu1.3
Architecture: amd64
CurrentDesktop: Unity
Date: Tue Sep 1 02:30:00 2015
InstallationDate: Installed on 2015-06-08 (84 days ago)
InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417)
SourcePackage: eog
UpgradeStatus: Upgraded to vivid on 2015-06-09 (83 days ago)

[Sebastien Bacher (seb128)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. The issue you are reporting is an upstream one and it would be nice if somebody having it could send the bug to the developers of the software by following the instructions at https://wiki.ubuntu.com/Bugs/Upstream/GNOME. If you have done so, please tell us the number of the upstream bug (or the link), so we can add a bugwatch that will inform us about its status. Thanks in advance.