Translations are often multi-line. Using a regular `<input>` doesn't allow newlines, so if you try to edit a multiline theme translation, all the line breaks will be removed.
This commit updates the theme translations UI to use `<textarea>`, just like the core translation editing UI.
Force pushing a commit to a theme repository used to break the updater,
because the system was not able to count the commits behind the old and
new version. This operation failed because a force push deleted the old
commits.
The user was prompted with a simple "500 server error" message.
Themes marked for auto update will be automatically updated when
Discourse is updated. This is triggered by discourse_docker or
docker_manager running Rake task 'themes:update'.
