mate-user-share-*.desktop in XDG autostart: breakage near OnlyShowIn= key due to empty Categories= key

[sunweaver]

Expected behaviour

Intact *.desktop files in /etc/xdg/autostart/

Actual behaviour

OnlyShowIn= key gets appended to Categories= key and thus "disables" OnlyShowIn= field. Consequently, mate-user-share-*.desktop application get launched in every other desktop env installed on the system

Steps to reproduce the behaviour

Launch non-MATE desktop env, inspect /etc/xdg/autostart/mate-user-share*.desktop

MATE general version

1.24

Package version

1.24.0-1

Linux Distribution

Debian

Link to downstream report of your Distribution

https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=952401