Allow to update translation comments from UI

[surli]

Just to clarify the vocabulary: I'll never talk about "user comments" for discussing about a translation here, but I'm talking about the comments that can be attached to a translation key in a source file, like this:

// this a comment for my translation key
my.translation.key=Some translation

Is your feature request related to a problem? If so, please describe.

I recently created #5897 because we had issues with translation key comments, we will work on it, but it would have helpful for us to be able to directly edit the translation key comments directly from the UI.

Describe the solution you'd like

We'd like to be able to edit the translation key comments from the UI, without having to directly edit the source/translation files. Of course this should be protected with a specific right.

Describe alternatives you've considered

For now the only alternative I can think about is to edit directly the files on our repository.

Screenshots

As shown here there's no possibility to edit the comment:

[nijel]

Related to https://github.com/WeblateOrg/weblate/issues/772, https://github.com/WeblateOrg/weblate/issues/5519, https://github.com/WeblateOrg/weblate/issues/5696

[github-actions[bot]]

This issue has been added to the backlog. It is not scheduled on the Weblate roadmap, but it eventually might be implemented. In case you need this feature soon, please consider helping or push it by funding the development.

[comradekingu]

I think they should be in the translation files when possible, and link to images if available.

[nijel]

In many cases, it is not desired to have additional comments in the file - for example when file size is a concern. For example https://kodi.weblate.cloud/ cares about that.