Rather than using.
kdesudo kate ...
Which is KDE specific. What about changing documentation to.
su-to-root -X -c kate ...
That command is slightly more complicated (just the extra -X -c), but that command is agnostic about the desktop environment. Other desktop environments such as Gnome that come with gksudo by default would then be easier to use.
If that sounds good, I could easily and quickly mass search and replace that string in the wiki thanks to the replace text mediawiki extension.
- work on https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=793376 needed