rename desktop Install icon to something ubuntu specific
|Reported by:||hamish||Owned by:|
Considering all the installers we have floating around a user may become easily confused as to the meaning of the Install button on the desktop. Hopefully they stop before reformatting their hard drive, but it could be a good way to permanently harm the user's experience.
an attempt is made in r2382, but that may need to happen later in the build process though; not sure.
also the existing solution does bad things to non-english translations with the same root, perhaps better to use a stricter s/=Install$/.../