fix: added exact modifier to tab keydown event

mentioned in commit 47dbf3d4

mentioned in merge request gitlab!90318 (merged)

mentioned in merge request gitlab-org/gitlab-services/design.gitlab.com!2906 (merged)

mentioned in merge request status-page!545 (merged)

mentioned in merge request gitlab-docs!2841 (merged)

mentioned in merge request status-page!548 (merged)

mentioned in merge request gitlab-org/gitlab-services/design.gitlab.com!2914 (closed)