CapsLock cannot be disabled in the linux guest.
Steps to reproduce:
1. turn on capslock
2. type something
3. press capslock again
4. type someting
capslock turned off
capslock is turned on
Regression since the commit 73cd553fb0fbd213b64d72f8b4289ed8a17fc6c0
originally reported as https://bugzilla.redhat.com/show_bug.cgi?id=1458730
Author: Pavel Grunt <email@example.com>
Date: Tue Jul 11 13:34:12 2017 +0200
Revert "Ignore modifiers messages if no modifiers changed"