Move "ROCCAT Vulcan Pro Keyboard" out of experimental

[ensonic]

Introduction
The ROCCAT Vulcan Pro Keyboard is listed as work-in-progress, as of version 0.1.20, experimental, untested. I am using this since Christmas and a little nuisance is that when testing new code versions the driver-level is reset to from experimental to testing in /etc/eruption/eruption.conf each time I run sudo make install. I'd like to help to get this device out of experimental.

Device to add support for

> lsusb | grep RO
Bus 002 Device 003: ID 1e7d:30f7 ROCCAT ROCCAT Vulcan Pro
Bus 002 Device 002: ID 1e7d:2e2c ROCCAT ROCCAT Kone Aimo 16K

*Please attach your .pcapng file, if possible
I don't have any recent windows license. Also the RGB colors seems to work fine already.

[JonLit]

There is still an issue where in the GUI the Fn Key is always shown as black
(at least for me, German Layout)