Resolve "[Rails5] Fix `NoMethodError:  undefined method `-' for "3":String`"

Closes #46233

See merge request gitlab-org/gitlab-ce!18892

Resolve "[Rails5] Fix `Route source can't be blank`"

Closes #46228

See merge request gitlab-org/gitlab-ce!18890

Resolve "[Rails5] Fix app/views/groups/issues.html.haml"

Closes #46225

See merge request gitlab-org/gitlab-ce!18889

Support `js-close` as a removal class in UserCallout

See merge request gitlab-org/gitlab-ce!18790

Fixed none merge request files not being openable in the web IDE

See merge request gitlab-org/gitlab-ce!18881

Backport EE specific cluster spec changes to CE

See merge request gitlab-org/gitlab-ce!18866

Add missing tooltip to creation date on container registry overview

Closes #34229

See merge request gitlab-org/gitlab-ce!18767

Remove method call to deprecated method

See merge request gitlab-org/gitlab-ce!18815

Ensure runner_type is updated correctly when assigning shared runner to project

See merge request gitlab-org/gitlab-ce!18874

Resolve "Terms acceptance dropdown menu"

Closes #46210

See merge request gitlab-org/gitlab-ce!18862

Resolve "Move external link icon to end of link instead of front"

Closes #40725

See merge request gitlab-org/gitlab-ce!18828

Add documentation for Runner Registration API

Closes #42067

See merge request gitlab-org/gitlab-ce!16484

CE: Helm init before helm repo add

See merge request gitlab-org/gitlab-ce!18882

Given the settings initializer creates Gitaly Storage Settings objects
already, the calls to path can be moved to that initializer.

In Rails 5 the `per_page` argument came from `params` is String but an
Integer is expected.

This commit explicitly converts `per_page` to an Integer.
It fixes the errors like:

```
  1) Groups::ChildrenController GET #index for subgroups filtering children succeeds if multiple pages contain matching subgroups
     Failure/Error:
       hash[page] = second_collection.page(second_collection_page)
                      .per(per_page - paginated_first_collection(page).size)
                      .padding(offset)

     NoMethodError:
       undefined method `-' for "3":String
       Did you mean?  -@
     # ./lib/gitlab/multi_collection_paginator.rb:42:in `block in paginated_second_collection'
     # ./lib/gitlab/multi_collection_paginator.rb:46:in `paginated_second_collection'
     # ./lib/gitlab/multi_collection_paginator.rb:14:in `paginate'
     # ./app/finders/group_descendants_finder.rb:52:in `children'
     # ./app/finders/group_descendants_finder.rb:34:in `execute'
     # ./app/controllers/groups/children_controller.rb:36:in `setup_children'
     # ./app/controllers/groups/children_controller.rb:18:in `index'
     # ./lib/gitlab/i18n.rb:50:in `with_locale'
     # ./lib/gitlab/i18n.rb:56:in `with_user_locale'
     # ./app/controllers/application_controller.rb:351:in `set_locale'
     # ./spec/controllers/groups/children_controller_spec.rb:182:in `block (5 levels) in <top (required)>'
     # ./spec/spec_helper.rb:198:in `block (2 levels) in <top (required)>'
```

In Rails 5.0 automatic inverse does not work for polymorphic relathionships.
It was fixed in Rails 5.2: https://github.com/rails/rails/pull/28808

Until that the `inverse_of: :source` argument should be set explicitly.

Fixes the errors like:

```
ActionView::Template::Error:
  Attempting to generate a URL from non-sanitized request parameters! An attacker can inject malicious data into the generated URL, such as changing the host. Whitelist and sanitize passed parameters to be secure.
```

Resolve "Wiki headings no longer show anchor link"

Closes #44956

See merge request gitlab-org/gitlab-ce!18591

ShaAttribute crashes with ArgumentError if column doesn't exist

See merge request gitlab-org/gitlab-ce!18880

Update gon ~> 6.1.0 to ~> 6.2

See merge request gitlab-org/gitlab-ce!18764

- Document Registation - POST `/runners/`
- Document Deletion - DELETE `/runners/`
- Document Verification - POST `/runners/verify/

Fix finding wiki pages when they have invalidly-encoded content

Closes #43715

See merge request gitlab-org/gitlab-ce!18856

Hide merge request option in IDE when merge requests are disabled

Closes #45698

See merge request gitlab-org/gitlab-ce!18857

Fix outdated web ide copy

See merge request gitlab-org/gitlab-ce!18861

Merge branch '41229-include-the-human-repo-name-in-gitlab-shell-log-when-hashed-storage-is-in-use' into 'master'

Resolve "Include the human repo name in gitlab-shell.log when hashed storage is in use"

Closes #41229

See merge request gitlab-org/gitlab-ce!18870

Support resetting of Prometheus metrics between test runs

Closes #39968

See merge request gitlab-org/gitlab-ce!18836

Remove accidental EE additions in CE

See merge request gitlab-org/gitlab-ce!18877

Improve fix for intermittent QA failure in "cloning code using a deploy key"

Closes charts/gitlab#396

See merge request gitlab-org/gitlab-ce!18608

Resolve "Update `updated_at` on an issue when label or time spent was added"

Closes #45442

See merge request gitlab-org/gitlab-ce!18757

[CE] Backport with_forgery_protection spec helper

See merge request gitlab-org/gitlab-ce!18833

Backport some changes from gitlab-ee!5476

See merge request gitlab-org/gitlab-ce!18760