salt.modules.keyboard function get_sys traceback when cmd.run fails

Description of Issue

File "/usr/lib/python3/dist-packages/salt/modules/keyboard.py", line 50, in get_sys
ret = out[1].replace('"', '')
IndexError: list index out of range

Setup (sls):

set /etc/default/keyboard:
  keyboard.system:
    - name: de

As in https://docs.saltstack.com/en/develop/ref/modules/all/salt.modules.keyboard.html

Steps to Reproduce Issue

If the internal cmd.run for get_sys does not work (logged out = 'Could not get properties: Connection timed out') the traceback appears!

salt --versions-report

Salt Version:
Salt: 2019.2.2

Dependency Versions:
cffi: Not Installed
cherrypy: Not Installed
dateutil: 2.6.1
docker-py: Not Installed
gitdb: 2.0.3
gitpython: 2.1.8
ioflo: Not Installed
Jinja2: 2.10
libgit2: Not Installed
libnacl: Not Installed
M2Crypto: Not Installed
Mako: Not Installed
msgpack-pure: Not Installed
msgpack-python: 0.5.6
mysql-python: Not Installed
pycparser: Not Installed
pycrypto: 2.6.1
pycryptodome: Not Installed
pygit2: Not Installed
Python: 3.6.9 (default, Nov 7 2019, 10:44:02)
python-gnupg: 0.4.1
PyYAML: 3.12
PyZMQ: 16.0.2
RAET: Not Installed
smmap: 2.0.3
timelib: Not Installed
Tornado: 4.5.3
ZMQ: 4.2.5

System Versions:
dist: Ubuntu 18.04 bionic
locale: ANSI_X3.4-1968
machine: x86_64
release: 4.15.0-64-generic
system: Linux
version: Ubuntu 18.04 bionic

Start with /usr/lib/python3/dist-packages/salt/modules/keyboard.py, especially get_sys around line 50, and reproduce the issue using the keyboard.system state described in the report. Inspect how get_sys handles the internal cmd.run result when it reports a timeout. Done means that failure no longer produces an IndexError traceback and is handled consistently with the module's existing behavior.