Fix issuable state indicator

Closes gitlab-ee#4683

See merge request gitlab-org/gitlab-ce!17878

Resolve "Indicate supported image formats in avatar error"

Closes #43771

See merge request gitlab-org/gitlab-ce!17747

Merge branch '43482-enabling-auto-devops-on-an-empty-project-gives-you-wrong-information' into 'master'

Resolve "Enabling Auto DevOps on an empty project gives you wrong information"

Closes #43482

See merge request gitlab-org/gitlab-ce!17605

Route path lookups through legacy_disk_path

See merge request gitlab-org/gitlab-ce!17743

Rename modal.vue to deprecated_modal.vue

See merge request gitlab-org/gitlab-ce!17438

Now the issuable reference check works only in project scope, if we
reference an issuable from a non-project resource (e.g. epics), then
project is not set, and there is mismatch in generated issue references.

This patch enables issuable reference state check also from group scope.

Closes gitlab-ee#4683
Related to #30916

Increase the memory limits used in the unicorn killer

Closes gitlab-com/infrastructure#19

See merge request gitlab-org/gitlab-ce!17948

Add read-only banner to all pages

Closes #43937

See merge request gitlab-org/gitlab-ce!17798

These limits were updated in our docs, and in omnibus some time ago. But
the defaults in the source-install were missed.

Use porcelain commit lookup method on CI::CreatePipelineService

Closes charts/helm.gitlab.io#291

See merge request gitlab-org/gitlab-ce!17911

Added prettierignore file

Closes #44483

See merge request gitlab-org/gitlab-ce!17907

Disable webpack scope hoisting in development

See merge request gitlab-org/gitlab-ce!17942

When the database is in a read-only state, display a banner on each
page informing the user they cannot write to that GitLab instance.

Closes gitlab-org/gitlab-ce#43937.

UI breakdown of message of the last pushed branch for Create merge request

Closes #44382

See merge request gitlab-org/gitlab-ce!17821

Resolve "Some dropdowns have two scroll bars."

Closes #43273

See merge request gitlab-org/gitlab-ce!17665

Fix the other "A copy of ..." error for ReadOnly

Closes #44365

See merge request gitlab-org/gitlab-ce!17935

Add the /help page in robots.txt

Closes #44433

See merge request gitlab-org/gitlab-ce!17928

make a little more obvious what operations might need downtime or enhanced migration techniques

See merge request gitlab-org/gitlab-ce!17927

Same strategy with:
https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/17810

See:
https://stackoverflow.com/a/29710188/1992201

Frankly I don't really understand how this works and I don't really
care either. However I tried it and it does the job. To try this,
make sure you have pending migrations, and run the server, hit the site.
It would tell you that there's pending migrations, and then run
migrations, and then hit the site again.

Without this patch, Rails would complain that "A copy of ...",
with this patch, it works without problems.

Poor UX with branch whose name is very long on Branches

Closes #44386

See merge request gitlab-org/gitlab-ce!17832

Backport 4006 add weight indicator to issues board

See merge request gitlab-org/gitlab-ce!17923

Merge branch 'leipert-42037-long-instance-names-group-names-covers-namespace-dropdown' into 'master'

Prevent overflow of long instance urls during Project creation

Closes #42037

See merge request gitlab-org/gitlab-ce!17717

Before we were using a "plumbing" Gitlab::Git method that does not go
through Gitaly migration checking.

Introduce latest security changes to `master`

See merge request gitlab-org/gitlab-ce!17905

Resolve "Performance bar modal box content overflows"

Closes #44453

See merge request gitlab-org/gitlab-ce!17889

Add image for clearing the cache docs

Closes gitlab-ee#4642

See merge request gitlab-org/gitlab-ce!17932

Remove calls to clear_cache from Git::Wiki

Closes gitaly#1095

See merge request gitlab-org/gitlab-ce!17914

Closes https://gitlab.com/gitlab-org/gitlab-ee/issues/4642