This new global setting will allow admins to specify if HTML emails should be sent or not,
this is basically useful when system administrators want to save some disk space by avoiding
emails in HTML format and using only the Plain Text version.

Remove heading ids from University docs

Having ids in headings was preventing the ToC to render correctly

See merge request !7720

[ci skip]

Fix `LFS enabled` select box.

A refactor of the project edit page caused the `lfs_enabled` setting to be reverted to a non functioning state. This MR fixes that.

This will most likely need to be ported back to 8.13 and 8.14. 8.12 contained the correct code.

Fixes #24645 

Related commits:

- ea3bbbde
- da07c2e4

cc @stanhu @dblessing @dbalexandre @rymai

See merge request !7716

Use Commit#author so we share logic and cache

See merge request !7715

It was not displaying the proper value and had an out of place look to it.

Closes #24900

move timeago.js to vendor directory

## What does this MR do?

moves timeago.js into `/vendor/assets/javascripts` for consistency with other external javascript libraries.

## Are there points in the code the reviewer needs to double check?

make sure timeago still works as it should...?  I don't see how this could have broken anything.

## Why was this MR needed?

consistency with our guidelines

## Does this MR meet the acceptance criteria?

- Tests
  - [x] All builds are passing
- [x] Conform by the [merge request performance guides](http://docs.gitlab.com/ce/development/merge_request_performance_guidelines.html)
- [x] Conform by the [style guides](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/CONTRIBUTING.md#style-guides)
- [x] Branch has no merge conflicts with `master` (if it does - rebase it please)
- [x] [Squashed related commits together](https://git-scm.com/book/en/Git-Tools-Rewriting-History#Squashing-Commits)

## What are the relevant issue numbers?

See discussion in [!6274](https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/6274#note_18625583)

See merge request !7590

fixes non-retina shadow and browser zoom issue

## What does this MR do?
This MR closes #24851 and shadow issue for browser zoom 

## Are there points in the code the reviewer needs to double check?
NR

## Screenshots (if relevant)
**Ratina Display:**
![normal](/uploads/18fb0e321eff55cb89413745413cfe8a/normal.png)

**Non Retina**
![non-retina](/uploads/85ce8d3b22a025c251142bebe30c4401/non-retina.png)

**110% zoom**
![ratina](/uploads/bc0f2468ba780998e0e2b60a6d07e8db/ratina.png)

## Does this MR meet the acceptance criteria?

- [ ] [Changelog entry](https://docs.gitlab.com/ce/development/changelog.html) added
- [ ] [Documentation created/updated](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/doc/development/doc_styleguide.md)
- [ ] API support added
- Tests
  - [ ] Added for this feature/bug
  - [x] All builds are passing
- [ ] Conform by the [merge request performance guides](http://docs.gitlab.com/ce/development/merge_request_performance_guidelines.html)
- [x] Conform by the [style guides](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/CONTRIBUTING.md#style-guides)
- [x] Branch has no merge conflicts with `master` (if it does - rebase it please)
- [ ] [Squashed related commits together](https://git-scm.com/book/en/Git-Tools-Rewriting-History#Squashing-Commits)

## What are the relevant issue numbers?


Closes #24851

See merge request !7712

Use default `closest` if available!

## What does this MR do?

We should use the default `Element.prototype.closest` if its available.

## Are there points in the code the reviewer needs to double check?

## Why was this MR needed?

## Screenshots (if relevant)

## Does this MR meet the acceptance criteria?

- [ ] [Changelog entry](https://docs.gitlab.com/ce/development/changelog.html) added
- [ ] [Documentation created/updated](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/doc/development/doc_styleguide.md)
- [ ] API support added
- Tests
  - [ ] Added for this feature/bug
  - [x] All builds are passing
- [x] Conform by the [merge request performance guides](http://docs.gitlab.com/ce/development/merge_request_performance_guidelines.html)
- [x] Conform by the [style guides](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/CONTRIBUTING.md#style-guides)
- [x] Branch has no merge conflicts with `master` (if it does - rebase it please)
- [x] [Squashed related commits together](https://git-scm.com/book/en/Git-Tools-Rewriting-History#Squashing-Commits)

## What are the relevant issue numbers?

See merge request !7706

Fixed dragging issues on issue boards

## What does this MR do?

This fixes a few issues all at once:

- Fixes an issue when dragging an issue to a list but actually removes another issue from the original list
- Fixes an issue that caused the issue card to be appended to the bottom of the list
- Fixes an issue when dragging an issue would actually open up the sidebar

## What are the relevant issue numbers?

Closes #24654

See merge request !7701

Adds polyfill for CustomEvent

## What does this MR do?
CustomEvent is not supported by IE.- https://developer.mozilla.org/en-US/docs/Web/API/CustomEvent

In order to stop using jQuery in new files that need to listen to custom events we need this polyfill.

## Are there points in the code the reviewer needs to double check?

## Why was this MR needed?

## Screenshots (if relevant)

## Does this MR meet the acceptance criteria?

- [ ] [Changelog entry](https://docs.gitlab.com/ce/development/changelog.html) added
- [ ] [Documentation created/updated](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/doc/development/doc_styleguide.md)
- [ ] API support added
- Tests
  - [ ] Added for this feature/bug
  - [ ] All builds are passing
- [x] Conform by the [merge request performance guides](http://docs.gitlab.com/ce/development/merge_request_performance_guidelines.html)
- [x] Conform by the [style guides](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/CONTRIBUTING.md#style-guides)
- [x] Branch has no merge conflicts with `master` (if it does - rebase it please)
- [ ] [Squashed related commits together](https://git-scm.com/book/en/Git-Tools-Rewriting-History#Squashing-Commits)

## What are the relevant issue numbers?

See merge request !7705

Fix BASH usage in the .gitlab-ci.yml

As discussed on Slack. Even though I created the fix, I was a mere code monkey in this case.

See merge request !7693

API: Add endpoint to delete a group share

Closes #24771

See merge request !7662

add details that Git LFS must be enabled in project

## What does this MR do?

Add details that Git LFS must be enabled in project before it will work

See merge request !7680

Grapify the sidekiq metrics API

Related to #22928

See merge request !7699

Add support of Chrome/Chromium in requirements.md

See merge request !7703

[ci skip]

Closes https://gitlab.com/gitlab-org/gitlab-ce/issues/24863

See merge request !7698

Closes #24654

Add a starting date to milestones

Closes https://gitlab.com/gitlab-org/gitlab-ce/issues/23704

See merge request !7484

post_receive: accept any user email from last commit

See merge request !7225

Use authorized projects in ProjectTeam

Closes #23938 and #23636

See merge request !7586

Ensure we sanitize branch names with path-unfriendly characters

See merge request !7696

Closes #23938

So that it matches the same access given in
Projects::CreateService#after_create_actions

Use the minimum access level of group link and group member when inserting authorized project records

Remove empty describe block in service spec

See merge request !7669