Fixed in Xubuntu in xubuntu-default-settings version 15.04.4 at http://changelogs.ubuntu.com/changelogs/pool/universe/x/xubuntu-default-settings/xubuntu-default-settings_15.04.4/changelog
Fixed in Xubuntu in xubuntu- default- settings version 15.04.4 at http:// changelogs. ubuntu. com/changelogs/ pool/universe/ x/xubuntu- default- settings/ xubuntu- default- settings_ 15.04.4/ changelog