Fix mentions not being created upon issue/merge request update

New cross-references weren't being added when they were made in an issue or merge request update.

This happened because the relevant `UpdateService`s were making the `notice_added_references` call
after the model had already been updated and saved, so the `changes` attribute was empty and no
cross-references were made at all.

This fixes the bug and adds a bit of testing and a bit of refactoring.

Closes #1773

See merge request !974

Allow user to specify content he wants to see on project page

Improvement to !938. Since a lot of people complain on fact they don't like to see README.
Especially since we already have a switcher for dashboard - it kind of acceptable to select behaviour.

User can specify which content he/she wants to see:

![Screenshot_2015-07-13_18.24.31](https://gitlab.com/gitlab-org/gitlab-ce/uploads/d237474e8f52df4a62ba7e951fa28bd8/Screenshot_2015-07-13_18.24.31.png)

![Screenshot_2015-07-13_18.24.36](https://gitlab.com/gitlab-org/gitlab-ce/uploads/473b0e2a94b3de16d048b8332b539816/Screenshot_2015-07-13_18.24.36.png)

cc @JobV @jacobvosmaer @marin @sytses

See merge request !970

It now accounts for models that have changed but have already been
persisted, such as when called from an UpdateService.

Closes #1773

Replaced icon for project page dropdown button

Improve for !971

![Screenshot_2015-07-13_23.37.01](https://gitlab.com/gitlab-org/gitlab-ce/uploads/2b168c6f8a07f33cab4ca8f735646f8a/Screenshot_2015-07-13_23.37.01.png)

See merge request !973

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

Use password field defaults for services

Previously we masked the password field manually. After the refactor that services page received we can use `password_field` default masking.

Fixes internal https://dev.gitlab.org/gitlab/gitlab-ee/issues/314

See merge request !969

Add dropdown to quickly create issue or branch from project page

because just 'new issue' link is not valid for all users. A lot of people use external issue tracker. So I grouped several links under one button

![Screenshot_2015-07-13_18.40.43](https://gitlab.com/gitlab-org/gitlab-ce/uploads/9db7394c16d1a8718c8a6a15fd2c98cc/Screenshot_2015-07-13_18.40.43.png)

![Screenshot_2015-07-13_18.40.41](https://gitlab.com/gitlab-org/gitlab-ce/uploads/d880532bb15370bb3f8e76bd06b411ad/Screenshot_2015-07-13_18.40.41.png)

cc @JobV @marin @jacobvosmaer @sytses

See merge request !971

Scroll sidebar

On small screens content of sidebar does not fit. This merge request makes sidebar scrollable which makes it usable for tablets and small laptops.

This merge request has no screenshot because it brings no visual change. Its about action.

cc @darby @JobV

See merge request !972

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

Revert "use relative link to SSH setup page"

This broke on GitLab.com.

This reverts commit f876ef6e.

See merge request !952

This reverts commit 903daedb.

Hide icon for bact-to-location menu in sidebar

cc @JobV

![Screenshot_2015-07-13_11.37.39](https://gitlab.com/gitlab-org/gitlab-ce/uploads/39d871b6a0e0e555cb497aee865a2f45/Screenshot_2015-07-13_11.37.39.png)

See merge request !968

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

Add error message for SSH key linebreaks

Solves this [request](http://feedback.gitlab.com/forums/176466-general/suggestions/5653544-check-for-linebreaks-in-ssh-key).

See merge request !672

Add Safari/iOS and Windows 8 logo information

Now that we've got our 🔥 new logo, let's spread it around a bit more!

Closes #1908

See merge request !944

Changed the color of admin/application_settings buttons

Now they look like this: ![image](https://gitlab.com/gitlab-org/gitlab-ce/uploads/a43c0c7fada5768bddda6e3449b37a5e/image.png)

gray when selected, white when not.

See merge request !887

Allow admins to disable 2FA for a user

> ![Screen_Shot_2015-07-10_at_5.19.13_PM](https://gitlab.com/gitlab-org/gitlab-ce/uploads/3f9bb7c783110d2689c282879cb4b061/Screen_Shot_2015-07-10_at_5.19.13_PM.png)

Depends on !961

See merge request !962

Add User#disable_two_factor!

This method encapsulates all the logic for disabling 2FA on a specific
User model.

See merge request !961

Fix transferring of project to another group using the API.

Addresses internal issue https://dev.gitlab.org/gitlab/gitlabhq/issues/2397.

See merge request !926

Only enable HSTS header for HTTPS and port 443

### What does this MR do?

This MR adds a check that the port used is 443, in addition to HTTPS being enabled, when activating the HSTS header.

### Why was this MR needed?

If a user is using a non-standard port for SSL, enabling this header would send clients to port 443 when that port is invalid.

### What are the relevant issue numbers?

Closes https://github.com/gitlabhq/gitlabhq/issues/9449

See merge request !966

Closes https://github.com/gitlabhq/gitlabhq/issues/9449

Implement faster search of code (via git grep)

Much faster than iterating over each file using rugged.

Performance compare for Linux repository using keyword `sha`:

```
OLD: 250 seconds
NEW: 9 seconds
```

See merge request !957

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

Better handle unknown projects and groups for autocomplete

While working on !963, I noticed that specifying an unknown project ID or group ID would cause an error in the controller. This MR improves on the handling of unknown projects or groups:

1. If the user is authenticated, return a blank JSON with a 404 error.
2. Otherwise, redirect the user to login so we don't leak information about whether certain projects/groups exist.

See merge request !964

Fix typo and remove duplicate entry shipped in v7.12.2

See merge request !965

Fix user autocomplete for unauthenticated users accessing public projects

Closes #1955

See merge request !963