Merge branch '496438-fix-domain-mismatch-ui-error' into 'master'

Fix Web IDE Oauth domain mismatch screen

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/167598



Merged-by: Paul Slaughter <pslaughter@gitlab.com>
Approved-by: Paul Slaughter <pslaughter@gitlab.com>
Co-authored-by: Enrique Alcantara <ealcantara@gitlab.com>