Rename Code tab to Repository

As discussed in #18830, this renames the "Code" tab to "Repository".

Screenshot now:

![image](/uploads/a7807dfb5b42f037fe2a44475a4af883/image.png)


See merge request !4807

Apply responsive design for Contributors graphs.

## What does this MR do?

Makes the Contributors graphs work on mobile.

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

That this doesn't break on any screen sizes.

## Why was this MR needed?

It used to be squished and impossible to read.

## What are the relevant issue numbers?

Fixes #18845.

## Screenshots (if relevant)

Before:

![Screen_Shot_2016-06-18_at_1.00.58_PM](/uploads/bc17df5dabed0085c8ffdca303a502a5/Screen_Shot_2016-06-18_at_1.00.58_PM.png)

After:

![Screen_Shot_2016-06-20_at_9.21.03_AM](/uploads/a0307cb255646800d0e4c8647769f7b6/Screen_Shot_2016-06-20_at_9.21.03_AM.png)

cc: @jschatz1 

See merge request !4801

Update gray block under subnav to match other pages

## What does this MR do?
Makes Compare sub nav full width; replaces gray block with white one to match rest of pages

## What are the relevant issue numbers?
Closes #18934 

## Screenshots (if relevant)
![Screen_Shot_2016-06-21_at_1.14.46_PM](/uploads/43377efe7816b854f48966bcbd96a1cc/Screen_Shot_2016-06-21_at_1.14.46_PM.png)

cc @dzaporozhets 

See merge request !4838

Update browser gem to 2.2.0

A user with a certain browser would hit an Error 500:

```
ArgumentError: invalid value for Float(): "0."
  from browser/accept_language.rb:45:in `Float'
  from browser/accept_language.rb:45:in `quality'
  from browser/accept_language.rb:15:in `each'
  from browser/accept_language.rb:15:in `sort_by'
  from browser/accept_language.rb:15:in `parse'
  from browser/base.rb:13:in `initialize'
  from browser.rb:125:in `new'
  from browser.rb:125:in `block in new'
  from browser.rb:125:in `map'
  from browser.rb:125:in `new'
  from browser/action_controller.rb:15:in `browser'
  from abstract_controller/helpers.rb:67:in `browser'
  from app/views/layouts/_head.html.haml:38:in `_app_views_layouts__head_html_haml__1626593241142487258_59224880'
```

The root cause when the `Accept-Language` header would contain a float for the quality value (e.g. en-GB,en;q=0.v5).

Fixes https://github.com/fnando/browser/issues/241

Seen today via Sentry: https://sentry.gitlap.com/gitlab/gitlabcom/issues/7644/

See merge request !4811

Fixed private forks notice position in forks list

Moves the private forks notification item into the list on the forks page.

Closes #17671.

See merge request !4573

Move pre_process into render_result

This MR moves `Banzai::Renderer.pre_process` into `Banzai::Renderer.render_result`.

The `pre_process` method was called even when its output would be ignored. See 11a5a4f359ee57029dbfcc9185fc6b47243ea2aa for more details.

See merge request !4830

Add missing link to sidekiq metrics in API README



See merge request !4837

jQuery selector refactor in application.js.

Minor refactor for unnecessarily repeated `$(document)` `$(window)` and `$('body')`

See merge request !4809