[TwigBridge] bootstrap4 file_widget: allow setting label attributes declared in label_attr #31220
But currently the attributes declared in label_attr aren't being added.
Previously I sent this same change to the master branch (PR #31102), but I think I should have sent it to branch 4.2
Apr 27, 2019
Sorry, it causes some issues on Platform.sh. As there PHP 7.2 comes with Redis 3.1.2.