Launchpad should show the currently used translation when a suggestion has been rejected

[Thibault D]

Currently, when you look at the translations done by someone, you can see:

Translations by John Doe
John Doe has submitted the following strings to this translation. Contributions are visually coded: currently used translations, unreviewed suggestions, rejected suggestions.

But when a translation suggestion has been rejected, Launchpad does not show the translation used instead.
This information would help the translator to understand why its suggestion was rejected, and to avoid reproducing it.

For example, Launchpad could provide this information on a third line:
[English] >>> Sync Locally?
[French: rejected] >>> Synchroniser localement ?
[French: currently used] >>> Synchroniser localement[nbsp]?

Additionally, the diff between rejected/used could be visually coded with another colour to see what was 'wrong'.