Rosetta should add package groups

It would help translators send stuff upstream if packages could be grouped/searched by upstream source.

Such a grouping already exists: https://edge.launchpad.net/gnome lists all packages from Gnome, but there is no way to see this grouping while searching in Ubuntu https://translations.edge.launchpad.net/ubuntu/karmic/+lang/ro.

If one could see all the gnome packages and not be bothered the rest up to 1600 packages unrelated to gnome, he could:
* decide more easily which packages should be sent upstream,
* check whether the translations from upstream are better than the ones in Ubuntu (Rosetta does not replace translations made in LP with newer ones from upstream, it just shows the new ones as suggestions).

Another important grouping would be the "installed-on-livecd" which would list all packages installed by default on the live cd.
Instead of the way packages are ordered by Rosetta admins to bump the importance of some packages that are installed on the LiveCD and should be translated, users could find this information from this special group.

Some other kinds of groups would make sense too: installed-on-kubuntu-cd, installed-on-xubuntu-cd, etc.