Feature summary (what you would like to be able to do and where):
On https://translatewiki.net/wiki/Special:Translations (available from individual messages via link "In other languages"), there should be a way to sort translations by modified date.

Use case(s) (list the steps that you performed to discover that problem, and describe the actual underlying problem which you want to solve. Do not describe only a solution):
1​. I updated the original, English, version of a message.
2.1. I want to see the translations of the newest version and, if necessary, make adjustments.
2.2. Or (as in the actual case which led to this feature request), if I realized I make a technical mistake in the original which got its way to Translatewiki (and the new translations have already started coming it), then, after I fixed the original, I want to be able to fix the translations myself without putting this burden on translators.