Fixed issue with build auto-refresh not working
## What does this MR do?
Due to the `.json` at the end of the build URL fetch, the page wont correctly auto-reload the build log. This fixes that.
See merge request !5110
Added 100% width to open dropdown menus on mobile
## What does this MR do?
Sets dropdown-menus to be 100% width on small screens.
## Are there points in the code the reviewer needs to double check?
Do we want this on all dropdown menus or only dropdown menus activated by full-width buttons?
/cc @dzaporozhets
## Why was this MR needed?
Mobile UX.
## What are the relevant issue numbers?
Closes#18858.
## Screenshots (if relevant)

## Does this MR meet the acceptance criteria?
- [ ] [CHANGELOG](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/CHANGELOG) entry 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 [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 !4844
Hacked in a better message for attachment network error
## What does this MR do?
Adds a better error message for when a user is uploading an attachment and they cannot reach the GitLab instance.
Now displays `Network error. Please check your connection.`.
## Are there points in the code the reviewer needs to double check?
As noted above, I think this is hacky, ideally this would be sent straight from the backend but if not then this should be handled globally?
/cc @fatihacet
## Why was this MR needed?
Attachment upload UX
## What are the relevant issue numbers?
Closes#19161.
## Screenshots (if relevant)
*UPDATED:*

## Does this MR meet the acceptance criteria?
- [ ] [CHANGELOG](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/CHANGELOG) entry 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
- [ ] Conform by the [style guides](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/CONTRIBUTING.md#style-guides)
- [ ] Branch has no merge conflicts with `master` (if you do - rebase it please)
- [ ] [Squashed related commits together](https://git-scm.com/book/en/Git-Tools-Rewriting-History#Squashing-Commits)
See merge request !4977
Naive attempt at fixing Underscore templates
## What does this MR do?
Attempts to fix part of #18939.
## Are there points in the code the reviewer needs to double check?
That this doesn't break anything.
## Why was this MR needed?
See #18939.
## What are the relevant issue numbers?
#18939
## Does this MR meet the acceptance criteria?
- Tests
- [ ] Added for this feature/bug
- [ ] All builds are passing
See merge request !4842
Fixed markdown buttons in FF
## What does this MR do?
The markdown buttons weren't working with the `execCommand` function. So it has to fallback to replacing the value in the textarea.
See merge request !5085
Add lib/gitlab/emoji.rb instead of gitlab_emoji gem and upgrade Gemojione
- No reason to split it into a separate gem when the gem barely did anything. We can use gemojione directly, making updating gemojione that much easier. Unless there's a particularly good reason we were using the gem?
- Fixes the Rake task since it broke after all the AwardEmoji changes.
- Update gemojione to 2.6.1.
Spring Update changes! http://emojione.com/releases/#2.2.0
See merge request !4919
Updated project header
## What does this MR do?
Updates the project header.
## What are the relevant issue numbers?
Closes#18544, #18832
## Screenshots (if relevant)

See merge request !4989
Fixed avatar alignment in new MR view
## What does this MR do?
Fixes the alignment of the avatar in the new MR compare view
## Screenshots (if relevant)

See merge request !5095
Added user avatar to header
## What does this MR do?
Adds the users avatar to the header with a dropdown for profile & sign out.
## What are the relevant issue numbers?
Closes#18543
## Screenshots (if relevant)


See merge request !4939
Cache autocomplete results
## What does this MR do?
Caches the results of the autocomplete AJAX call to stop new GFM inputs on the page from requesting new data. The cache is then cleared on each new page so that it doesn't stay around per project.
See merge request !5043
Expiry date on pinned nav cookie
## What does this MR do?
Adds an expiry date far into the future for the pinned nav cookie so that it survives logout & browser closing.
See merge request !5009
Global Ajax error handler
## What does this MR do?
Introduces a new global Ajax error handler to show a flash warning about the error detail of XHR requests which failed with status code 404 and 500
## Are there points in the code the reviewer needs to double check?
Double check the wording.
## Why was this MR needed?
A global solution for the problem in the #17880
## What are the relevant issue numbers?
Fixes#17880
## Screenshots (if relevant)
For requests failed with 404 - 500

For requests failed with 401

See merge request !4797
File Browser navigation fixes
Fixes a double request being made when clicking the file name when navigating through file browser and also fixes opening a file in a new tab or when doing ctrl + click.
Closes#19050
**Before**

**After**

See merge request !4891
Fixed 'use shortcuts' button on docs
## What does this MR do?
Exposes 'onToggleHelp() to window object through `showHelp()` so a help panel can be toggled globally using `showHelp()`.
## Are there points in the code the reviewer needs to double check?
Is this the best implementation? I actually think this is tidier than doing something like `onclick="new Shortcuts().onToggleHelp"` or `$.trigger 'keydown', char: '?'` but let me know.
## Why was this MR needed?
Docs UX
## What are the relevant issue numbers?
Closes#19157.
## Screenshots (if relevant)
## Does this MR meet the acceptance criteria?
- [ ] [CHANGELOG](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/CHANGELOG) entry 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 [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)
Closes#19157
See merge request !4979
Align flash messages with left side of page content
## What does this MR do?
- align flash messages with left side of page content
## Are there points in the code the reviewer needs to double check?
- flash messages in general
## Why was this MR needed?
- flash messages didn't fit new design
## What are the relevant issue numbers?
closes #18688
## Screenshots
# Before

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# After

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The left padding will be fixed by !4854

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See merge request !4959
Adds focus state style to markdown area buttons.
## What does this MR do?
It makes it possible to see when the button is focused when tabbing through the interface. This is for the new markdown buttons in the comment field.
See merge request !4867
Fixed comit avatar alignment
## What does this MR do?
Fixes the alignment of the avatar on https://gitlab.com/gitlab-org/gitlab-ce/blob/master/CHANGELOG
Also fixes potential issues in other places.
## Screenshots (if relevant)

See merge request !4933