This is the new base branch for the classref translations to prepare them
for the 3.5 release.
This means that the 3.4 class ref translations will likely no longer get
updates, as we can't easily maintain two slightly different branches on
Weblate.
It's useful context for translators but it generates very spammy diffs whenever
a line is added or removed, changing the comments for hundreds or thousands of
msgids needlessly.
We still have the file names so it's relatively easy to search in file to find
the location of the source string.
(cherry picked from commit dbfe36728e)
Merge the PO translations with the new template.
This adds the following changes:
- 8000 strings are still valid as is (80%)
- 2000 strings are marked fuzzy and need reviewing (20%)
- 1000 strings are new and need translation
