This slightly changes the semantics of the 'New Issue' and 'New MR' events to
include new mentions in edited Mentionables.

An alternative would be to introduce 'Issue updated' and 'MR updated' events,
but that would lead to questions about why those events were only available
to new mentions, and not existing mentions as well, so hold off for now.

Merge branch 'master' of https://gitlab.com/gitlab-org/gitlab-ce into 2451-fix-mentions-in-issue-updates

Use new PhantomJS version

## What does this MR do?
Makes CI builds to use PhantomJS 2.1.1.

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

## Why was this MR needed?

## What are the relevant issue numbers?

## 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
- [ ] 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 !5740

Try to get back todo's cache or at least avoid hitting the database

See merge request !5789

Speed up todos queries by limiting the projects set we join with

See merge request !5791

Follow-up 1003454c

Follow-up on 1003454c

Closes #20828

Change the order of the access rules to check simpler first, and add specs

See merge request !5799

Ability to restrict branches for pivotal tracker integration

## What does this MR do?
It allows to specify branches which you want to track for pivotal tracker integration.

## Why was this MR needed?
Typical use case: send commits to PivotalTracker and finish the story only when the feature branch is merged into master.

See merge request !5752

Fix a memory leak caused by Banzai::Filter::SanitizationFilter

See merge request !5808

In Banzai::Filter::SanitizationFilter#customize_whitelist, we append
three lambdas that has reference to the SanitizationFilter instance,
which in turn (potentially) has a reference to the following chain:

context hash -> Project instance -> Repository instance -> lookup hash
-> various Rugged instances -> various mmap-ed git pack files.

All of the above is not garbage collected because the array we append
the lambdas to is the constant
HTML::Pipeline::SanitizationFilter::WHITELIST.

- We weren't explicilty waiting for the page to load while navigating
  to the "Manage two-factor authentication" page. This was probably
  incidentally working for PhantomJS 1.x versions.

Don't show new MR URL after push when it doesn't make sense



See merge request !5786

Add archived badge to project listing

## What does this MR do?

Add an `archived` badge to the user project list, if the project is archived. 

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

No.

## Why was this MR needed?

Customer noted in https://gitlab.zendesk.com/agent/tickets/33787 that there is no distinction for archived projects in the project dashboard/explore projects page. There is an archived badge on the admin projects page, though.

## What are the relevant issue numbers?

## Screenshots (if relevant)

Existing admin projects page:

![Screen_Shot_2016-08-12_at_3.54.37_PM](/uploads/d6ba44c2d3be1f78372792b5ac406672/Screen_Shot_2016-08-12_at_3.54.37_PM.png)

New project list with archived badge:

![Screen_Shot_2016-08-12_at_3.54.21_PM](/uploads/3fa8bb9fe7588575aace0761984929a7/Screen_Shot_2016-08-12_at_3.54.21_PM.png)



See merge request !5798

Merge branch 'master' of https://gitlab.com/gitlab-org/gitlab-ce into 2451-fix-mentions-in-issue-updates