Merge topic 'reduce-display-warnings'

8f56fb68 Silence "bad X server" warning during autodetection

Acked-by: Kitware Robot <kwrobot@kitware.com>
Tested-by: buildbot <buildbot@kitware.com>
Reviewed-by: Jaswant Panchumarti (Kitware) <jaswant.panchumarti@kitware.com>
Reviewed-by: Mathieu Westphal (Kitware) <mathieu.westphal@kitware.com>
Merge-request: !11742