doesn't work with i3

[anatoly techtonik]

`gnome-screenshot` doesn't work with i3

$ gnome-screenshot --area --clipboard
** Message: 17:12:05.576: Unable to select area using GNOME Shell's builtin screenshot interface, resorting to fallback X11.
** Message: 17:12:09.870: Unable to use GNOME Shell's builtin screenshot interface, resorting to fallback X11.

Selection works, but buffer is empty. Checking file size:

$ xsel -po > 1 && xsel -so > 2 && xsel -bo > 3 && ls -l 1 2 3
-rw-rw-r-- 1 techtonik techtonik 2 Sep 25 17:14 1
-rw-rw-r-- 1 techtonik techtonik 0 Sep 25 17:14 2
-rw-rw-r-- 1 techtonik techtonik 0 Sep 25 17:14 3

`i3` developers told that it is not a bug in `i3` - https://github.com/i3/i3/issues/3422

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: gnome-screenshot 3.25.0-0ubuntu2
ProcVersionSignature: Ubuntu 4.15.0-35.38-generic 4.15.18
Uname: Linux 4.15.0-35-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia
ApportVersion: 2.20.9-0ubuntu7.4
Architecture: amd64
CurrentDesktop: i3
Date: Wed Sep 26 09:56:49 2018
SourcePackage: gnome-screenshot
UpgradeStatus: Upgraded to bionic on 2018-08-05 (51 days ago)

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Stein Gunnar Bakkeby (bakkeby)]

I added an explanation of this issue on https://gitlab.gnome.org/GNOME/gnome-screenshot/issues/14#note_517056