Wrap code in parallel view

Code scrolling was breaking the parallel layout. It should wrap on 'Side-by-side' mode

<img src="/uploads/db657e6c7f08ce57f1be615d7193136a/Screen_Shot_2016-04-14_at_4.28.31_PM.png" width="700px">

See merge request !3731

Fixed issue with commit time not using timeago



See merge request !3723

Fixed issue with spinner not hiding on diff changes

See merge request !3793

Add "action" tag to /internal/allowed API

See merge request !3791

This allows us to re-use any other analytics that rely on the "action"
tag having a value set.

Restrict public users for private instances

Implements #3508

See merge request !3440

Count the number of SQL queries per transaction

cc @pcarranza 

See merge request !3783

Fixed issue with tasklist toggling sidebar refresh

Closes #15270

See merge request !3782

Added loading icon to import buttons

See #14488 for more details

See merge request !3662

Print style

[test.pdf](/uploads/0dab5c1b2d0c4d0cd7e8930e9b660a9f/test.pdf)

Closes #14201

See merge request !3784

Discussion notes update

- At the moment discussion notes are rendered in a list but arent actually a list item and that can cause overflow issues
- Moved the dates to be in the header like other notes
- Fixed overlapping issue on mobile

See merge request !3720

Fixes gitlab-org/gitlab-ce#15335

Add environment variables on a job level in CI

Make it possible to define environment variables on a job level.

Closes #14716

See merge request !3612

Scroll to the last comment I made and edit it.

Pressing up in an empty comment box will edit your last comment. 

Also now when you click edit on a comment it will put the cursor at the end.

Closes https://gitlab.com/gitlab-org/gitlab-ce/issues/15267

![scrollup](/uploads/b056fdc479d39311f2be412458028a83/scrollup.gif)

See merge request !3757

At this point this is being handled by GitLab Runner and we need to
introduce this as a separate merge request.