Use default OOUI WindowManager instead of creating a new one
This avoids having to add it to the DOM ourselves.
How to register an account on GitLab. To prevent spam, new accounts are locked until approved by an admin or the approver bot. You can also file an unlock request to expedite access.
Support: mw:GitLab, how to host a project on GitLab, #wikimedia-gitlab on libera.chat, #GitLab on Phabricator.
This avoids having to add it to the DOM ourselves.