this will remove the need make N queries (per-note) at the
cost of having to mark notes with an attribute

this opens up the possibility for other special roles for notes

This changes the issue and MR index pages so the pagination system
re-uses the output of the COUNT(*) query used to calculate the number of
rows per state (opened, closed, etc). This removes the need for an
additional COUNT(*) on both pages.

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

I don't know why this happens exactly, but given an upstream and fork repository
from a customer, both of which required GC, resolving conflicts would corrupt
the fork so badly that it couldn't be cloned.

This isn't a perfect fix for that case, because the MR may still need to be
merged manually, but it does ensure that the repository is at least usable.

My best guess is that when we generate the index for the conflict
resolution (which we previously did in the target project), we obtain a
reference to an OID that doesn't exist in the source, even though we already
fetch the refs from the target into the source.

Explicitly setting the source project as the place to get the merge index from
seems to prevent repository corruption in this way.

Fixes https://sentry.gitlap.com/gitlab/gitlabcom/issues/26786/

https://gitlab.com/gitlab-org/gitlab-ce/builds/14070787

Also poll for pipeline changes on:
 - Pipeline table on commit page
 - Pipeline table on merge request page
 - Pipeline table on new merge request page

Do not check if coverage is enabled, just show it when it is available.

Fix for three open redirect vulns using redirect_to url_for(params.merge)))

See merge request !2082

See !10263

The instance variables set in this action are only used by the JSON
response. Visiting `merge_requests/:iid/diffs` in a browser always loads
the `show` action, so we don't need to find an MR diff, or an
environment, in that case.

Use detailed_status effectively. Remove unnecesarry context(nest). Add new context in merge_requests_controller_spec.rb and fix a bug. Correct description of spec.