Refactor issue boards and get the EE changes to CE
What does this MR do?
To avoid conflicts with the EE counterpart (https://gitlab.com/gitlab-org/gitlab-ee/merge_requests/6122#note_81490365), let's port the EE docs into CE.
http://ce-docs-refactor-issue-boards.178.62.207.141.xip.io/ce/user/project/issue_board.html
Edited by 🤖 GitLab Bot 🤖