Avoid deprecated warnings from ipython-qtconsole.desktop.

[bfroehle]

This fixes the warnings in .xsession-errors in Ubuntu 12.04.

Closes #1672.

[juliantaylor]

not quite right yet:

$desktop-file-validate ipython-qtconsole.desktop 
ipython-qtconsole.desktop: error: value "Unity" for string list key "OnlyShowIn" in group "Desktop Action Pylab" does not have a semicolon (';') as trailing character
ipython-qtconsole.desktop: error: value "Unity" for string list key "OnlyShowIn" in group "Desktop Action Pylabinline" does not have a semicolon (';') as trailing character

[takluyver]

With respect to OnlyShowIn: I don't know if any of the other desktop environments use desktop actions yet, but I don't think there's any need to make them Unity-specific from our end, so I suggest not using OnlyShowIn at all. I'd previously just copied and pasted from somewhere with the TargetEnvironment set.

[bfroehle]

Okay, let's try this again... :)

[takluyver]

Thanks, that verifies now. @juliantaylor , any other thoughts? If you're happy, I think we can merge this.

[juliantaylor]

one could still use the new icon instead of gnome-netstatus-idle

[takluyver]

But we can't guarantee that our icon is in any particular location, so don't we have to refer to one that's already in place, and let you (with your packaging hat on) set it up with the correct icon?

[bfroehle]

Let's save the icon for a different PR.

[takluyver]

Agreed. I've merged this one.