On all the issue lists -- Group, Project and Dashboard -- this
change adds a new option for managing the lists.
"Manual Ordering" option is added which when flipped on will allow
an user to drag and drop issues around to create a relative ordering
among them.
System hooks were not being triggered when projects were archived or
unarchived. Reuse the Projects::UpdateService to automatically
trigger system hooks and increase code reuse.
Honour issue and merge request visibility in their respective finders
This MR fixes a security issue with the IssuesFinder and MergeRequestFinder where they would return items the user did not have permission to see. This was most visible on the issue and merge requests page for a group containing projects that had set their issues or merge requests to "private".
Closes https://gitlab.com/gitlab-org/gitlab-ce/issues/22481
See merge request !2000