desktop-file-validate claims OnlyShowIn is deprecated
https://standards.freedesktop.org/menu-spec/latest/apb.html allows OnlyShowIn=Unity, but https://bazaar.launchpad.net/~shutter/shutter/devel/view/head:/share/applications/shutter.desktop fails the test with
$ desktop-file-validate shutter.desktop
shutter.desktop: warning: key "OnlyShowIn" in group "Desktop Action Redo" is deprecated
shutter.desktop: warning: key "OnlyShowIn" in group "Desktop Action Select" is deprecated
shutter.desktop: warning: key "OnlyShowIn" in group "Desktop Action Screen" is deprecated
shutter.desktop: warning: key "OnlyShowIn" in group "Desktop Action Window" is deprecated
shutter.desktop: warning: key "OnlyShowIn" in group "Desktop Action Active" is deprecated