It appears that the appstream project no longer supports
`translatable=no` properties, and gettext extract the
`translatable=no` marked strings as translatable.
I opened an issue to inform about the situation, but `translatable=no`
properties are not accepted by developers. You can find the issue
here: `https://github.com/ximion/appstream/issues/623`
**Please test your script or string extraction process before merging this PR.**
> In MetaInfo files, each individual paragraph of a description
> (or enumerated entry) is translated individually, however,
> you can only exclude the complete block from being translated
> by adding `translate="no"` to the description element.
Source: https://freedesktop.org/software/appstream/docs/sect-Quickstart-Translation.html
* po: Order POTFILES entries
Order entries alphabetically.
* data: Small touches
- Add vcs-browser URL
- Mark the app name as untranslatable
* data: Mark a string translatable
- Refresh list of remotes
