doc-rst: add CSS styles for :kbd: and :menuselection:

As we're about to use those two markups, add them to the
theme style overrride.

Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
This commit is contained in:
Mauro Carvalho Chehab 2016-09-19 08:07:35 -03:00 • committed by Jonathan Corbet
commit 1414f04888