Unregistered desktop category "Teaching"

[rseichter]

I see the following message when building on Gentoo Linux:

QA Notice: This package installs one or more .desktop files that do not
pass validation.

/usr/share/applications/kochmorse.desktop: error: value
"Education;Teaching;" for key "Categories" in group "Desktop Entry"
contains an unregistered value "Teaching"; values extending the format
should start with "X-"

I checked main categories and additional categories at freedesktop.org and "Teaching" can indeed not be found there. I'll create a pull request to fix this.

[hmatuschek]

Thanks, will be fixed in the next release.