Default key shorcut is bad

I'm using Gome-shell.

I use two displays and use the Ctrl+up and Crtl+down key shortcut to navigate between virtual desktops.
Remmina has a default key shorcut configuration using the Ctrl_right button to switch or activate the Grab function.

As one can expect this is very unpractical, this should be changed to use something more complicated like Ctrl+key to not be activated when unintended.

ProblemType: Bug
DistroRelease: Ubuntu 15.10
Package: remmina 1.1.2-2ubuntu3
ProcVersionSignature: Ubuntu 4.2.0-34.39-generic 4.2.8-ckt4
Uname: Linux 4.2.0-34-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.19.1-0ubuntu5
Architecture: amd64
CurrentDesktop: GNOME
Date: Mon Apr 4 11:02:43 2016
InstallationDate: Installed on 2015-01-07 (452 days ago)
InstallationMedia: Ubuntu 14.10 "Utopic Unicorn" - Release amd64 (20141022.1)
SourcePackage: remmina
UpgradeStatus: Upgraded to wily on 2015-10-16 (170 days ago)