Added day name to contributions calendar

## What does this MR do?

Adds the day name text into the contributions calendar tooltip.

## What are the relevant issue numbers?

Closes #19367 

## Screenshots (if relevant)

![Screen_Shot_2016-07-04_at_12.38.52](/uploads/edf6ac3454d479a345aee638875b7713/Screen_Shot_2016-07-04_at_12.38.52.png)

See merge request !5065

Remove pinTo from Flash

## What does this MR do?

- replace `pinTo` of `Flash` by `parent` parameter in constructor
- move positioning of layout containers from CoffeeScript to layout files
- adjust styling of inline flash messages

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

- display of flash messages in general

## Why was this MR needed?

- allow finding and positioning flash message containers within layout files
- allow adding different CSS classes to flash containers within layout files (necessary for fixing #18908)
- allow multiple flash messages to be displayed at different places at the same time
- make inline flash messages look nicer

## What are the relevant issue numbers?

closes #18908, closes part of #18897

## Screenshots

### Inline flash message (before)
![before](/uploads/c5b3cc05140eaeb9d14e481fa506ebbf/before.png)
![before-mobile](/uploads/004b1f2b9510bd97f4f8a7a6e56f17ef/before-mobile.png)

### Inline flash message (after)
![inline-flash-message](/uploads/fe2a23b63623612b696d529e81fa459e/inline-flash-message.png)
![inline-flash-mobile](/uploads/6207604acfebcf7402d77d5638c89ca8/inline-flash-mobile.png)

### Other flash messages (after)

![flash-message-issue](/uploads/d7e12bd0da68cfa333471ed102428cec/flash-message-issue.png)
---
![flash-new-project](/uploads/3465967dba83296068f154f149d26f64/flash-new-project.png)
---
![flash-sign-in](/uploads/4a5b317d5a369034f43343031607a0c2/flash-sign-in.png)
---
![flash-file-comment](/uploads/488a1119374be7e2173c0a590cfd8821/flash-file-comment.png)
---
![flash-fork](/uploads/f41964e8b910801e03eef3d7649e5009/flash-fork.png)
---
![flash-update-profile](/uploads/9fd972d6c6609fbbf86afcd99d343b5f/flash-update-profile.png)
---

### This is possible now

![flashs-everywhere](/uploads/07f425534511fb4ecaa1d7e2a9870787/flashs-everywhere.png)


See merge request !4854

[ci skip]

Clean up coffeescript files imported from GitLab CI

## What does this MR do?

This MR cleans up CoffeeScript files imported from GitLab CI along with a strategy #19159. Some files should have been removed in !1987.

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

While I think the `Build` module should be named as `Build`, not `CiBuild` in the JavaScript namespace, please check if it should.

## Why was this MR needed?

Removing unused coffeescript files reduces time to build JS and so time to transfer even in production. The fewer files, the better, too.

## What are the relevant issue numbers?

Closes #19159

## Screenshots (if relevant)

n/a

## Does this MR meet the acceptance criteria?

- [skipped] [CHANGELOG](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/CHANGELOG) entry added
- [skipped] [Documentation created/updated](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/doc/development/doc_styleguide.md)
- [skipped] API support added
- Tests
  - [skipped] Added for this feature/bug
  - [x] All builds are passing
- [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 you do - rebase it please)
- [x] [Squashed related commits together](https://git-scm.com/book/en/Git-Tools-Rewriting-History#Squashing-Commits)

See merge request !4925

Fix problems with events under notes importing GitLab projects

Fixes https://gitlab.com/gitlab-org/gitlab-ce/issues/19588

See merge request !5154

Correctly shows close button on merge requests

Closes #19403 

See merge request !5036