Instead of replacing translations, highlight changes in source for updates#196

Our main pain point with Weglot is that even minor updates to the source lead to manual translations being replaced by auto-translations without highlighting that this change has occurred. With high content output and continuous product page iterations by various team members, this is not a scaleable process.

We’d like to request that manual translations no longer get replaced by auto-translations after changes to the original content. Ideally, there should be a section where these changes are highlighted in the source to facilitate adjusting the manual translation.

@Remy you have made a merged-idea-loop! ;)