Launchpad/translation: Extended filtering during translation process.

[Aputsiak Niels Janussen]

This is a feature request for an extended filtering option in Launchpad's translation section.
As a translator or reviewer it is useful to be presented with content, where you yourself haven't been involved.

At the moment there is options to filter through the translations (see attached image):
- all items
- untranslated items
- translated items
- items with new suggestions
- items changed in Ubuntu

I suggest another filter - perhaps through another dropdown, that gives these options (the latter probably ought to be the default):
- do not show items I've contributed to
- show items I've contributed to

The primary reason for this suggestion is that it would save translators and reviewers the extra work needed going over the same strings again and again, when this is not what you want.
As a policy for reviewing, it will also be a help to avoid accepting your own suggestions if the language team has a convention of a independent review process.

Best regards!