Translations:MediaWiki 1.31/22/en

The set of extensions that are bundled with the MediaWiki tarball has increased. The new additions are:
 * provides a more friendly editor when editing CSS and JavaScript on-wiki.
 * provides a lightbox viewer for images and galleries.
 * provides two-factor authentication for wiki accounts.
 * provides a form to let administrators do string replacements on the entire wiki, for both page contents and page titles.
 * provides a form to let administrators do string replacements on the entire wiki, for both page contents and page titles.