When `object_class.link_reference_pattern` was `nil` because object
being processed do not implemement link references `call` method
returned `nil` instead of returning document, even if document has been
processed in for basic reference pattern.

Add routes and actions for dynamic tab loading. Closes #13588 and #13584



See merge request !2961

Contextually teach the user about the quick submit hotkey

When a user tabs to the submit button (i.e., the "wrong" way), we
display a tooltip with the quick submit hotkey so they can learn the
"right" way.

See merge request !2802

When a user tabs to the submit button (i.e., the "wrong" way), we
display a tooltip with the quick submit hotkey so they can learn the
"right" way.

Now it will work on any field inside that form, and it's easier to scope
new behavior, which is what we're adding next!

Notifications settings UI

Closes #13859 

![](https://gitlab.com/gitlab-org/gitlab-ce/uploads/125e8e3b14319b6cf95e9aa31659681a/notification-settings.png)

See merge request !3035

Preferences view

Closes #13861 

![](https://gitlab.com/gitlab-org/gitlab-ce/uploads/133ae7a1b4a0e931d5a6b19922eb2703/preferences-settings.png)

See merge request !3036

Audit log UI

Closes #13862

![](https://gitlab.com/gitlab-org/gitlab-ce/uploads/a6d6d1c3661173b95df9ec95f8e2f644/audit-log-settings.png)

See merge request !3037

Typo in API documentation

[ci skip]

See merge request !3058

[ci skip]

Add link to open merge requests on label index

Closes #13501 

See merge request !3057

Closes #13862

Closes #13861

Closes #13859

Profile settings

Closes #13853 

![](https://gitlab.com/gitlab-org/gitlab-ce/uploads/4fb28f2598de6d9ca4e5be8595dbe863/profile-settings.png)

See merge request !3038

Only show group member roles if explicitly requested

This very simply fixes an EE problem, but I made the change here so it's less prone to errors from merges.

In EE, prior to this change, group member roles were shown in project member list when a project is shared with a group. This is bad because the project explicitly shares with the group and sets a 'max access' level. If the max access level is 'developer' the project owner doesn't want to see 'Owner' in the group roles because it will confuse them. I verified that permissions are really being honored here, it was just an error in the view. You can see in https://gitlab.com/gitlab-org/gitlab-ee/blob/master/app/views/projects/project_members/_shared_group_members.html.haml#L18 where this was how it was intended to be. Likely a CE-EE merge introduced this bug. That's why I made the boolean required in CE even though this is for EE. 

## Before

![Screen_Shot_2016-03-01_at_8.59.02_AM](/uploads/704ab3149f60c363dd8374bd0c06a46a/Screen_Shot_2016-03-01_at_8.59.02_AM.png)

## After

![Screen_Shot_2016-03-01_at_9.17.54_AM](/uploads/5fcabef352cbc41dade037767f90ace3/Screen_Shot_2016-03-01_at_9.17.54_AM.png)

See merge request !3044

Tag deletion doesn't use AJAX anymore



See merge request !2986

Add Todos documentation

Closes https://gitlab.com/gitlab-org/gitlab-ce/issues/13884

See merge request !3064

[ci skip]

Don't show "Welcome to GitLab" when the search didn't return any projects

Fixes #13785. /cc @pixdrift

### Before

![Screen_Shot_2016-03-02_at_10.55.02](/uploads/b6b6ead2143d01e374ad296e72182d79/Screen_Shot_2016-03-02_at_10.55.02.png)

### After

![Screen_Shot_2016-03-02_at_12.12.33](/uploads/6e16c44e69039c534ea0fc3373c6060b/Screen_Shot_2016-03-02_at_12.12.33.png)

See merge request !3059

Added username to issue & merge request header

Closes #13771 

## Issue header

![Screen_Shot_2016-03-01_at_16.59.32](/uploads/a112dfb91eb9b6f911c716265b35043c/Screen_Shot_2016-03-01_at_16.59.32.png)

## Merge request header

![Screen_Shot_2016-03-01_at_16.59.26](/uploads/67bf9e65ac5cae4667db6c5148cb57a0/Screen_Shot_2016-03-01_at_16.59.26.png)

See merge request !3048

Closes #13853