Improve Bulk editing docs
What does this MR do?
Improves wording on the Bulk editing docs page, and adds a screenshot.
CE backport: https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/21074
Edited by 🤖 GitLab Bot 🤖
Improves wording on the Bulk editing docs page, and adds a screenshot.
CE backport: https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/21074