String freeze break? corrupt sentence in mutter GConf schema

[Owen Taylor <otaylor redhat com>]

https://bugzilla.gnome.org/show_bug.cgi?id=645224

 Determines whether workspace switching should happen for windows on all
 monitors or only the primary window.

Should be:

 Determines whether workspace switching should happen for windows on all
 monitors or only for windows on the primary monitor.

This string does not appear in the UI anywhere, you'd have to install
and run gconf-editor to see it. So the main advantage of fixing it would
be to avoid translators having to translate a nonsense sentence.

- Owen