This bug was fixed in the package xorg-server - 2:1.18.3-1ubuntu6
--------------- xorg-server (2:1.18.3-1ubuntu6) yakkety; urgency=medium
* debian/patches/xmir.patch: - Add focus/unfocus event passing (LP: #1582471)
-- Robert Ancell <email address hidden> Wed, 01 Jun 2016 11:07:46 +1200
This bug was fixed in the package xorg-server - 2:1.18.3-1ubuntu6
---------------
xorg-server (2:1.18.3-1ubuntu6) yakkety; urgency=medium
* debian/ patches/ xmir.patch:
- Add focus/unfocus event passing (LP: #1582471)
-- Robert Ancell <email address hidden> Wed, 01 Jun 2016 11:07:46 +1200