Adding Unity to OnlyShowIn allowed values

[Pierre Wieser]

> The use that pushed me to write the patch/email was with the Desktop
> Actions that we're putting in desktop file for static actions on the
> Launcher. Unfortunately, it's still an X- thing but I intend to update
> it to the current version of the Desktop Actions spec soon (because of
> release timing we needed something too quickly). In the actions that
> we've added and sent upstream we've been adding an "OnlyShowIn=Unity"
> to ensure they won't effect other projects. I have suggested a couple 
> of times that GNOME Shell should use the same actions, but I don't
> believe they currently are.

While talking about Desktop Actions, this remind me that I do not
know how to determine what is the currently running desktop :(

Does anyone could point me to some sort of library/hint or so ?

Thanks in advance.

Regards
Pierre