This is a follow-up to https://gitlab.com/gitlab-org/omnibus-gitlab/merge_requests/1956 and
https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/7308.

This reverts merge request !14148

Revert "Merge branch '35012-navigation-add-option-to-change-navigation-color-palette' into 'master'"

This reverts merge request !13619

An upcoming update to rubocop-gitlab-security added additional
violations.

Signed-off-by: NRémy Coutable <remy@rymai.me>

Signed-off-by: NRémy Coutable <remy@rymai.me>

And closer to the configuration setup. The code doesn’t need to know about this.

When sign-in is disabled:
 - skip password expiration checks
 - prevent password reset requests
 - don’t show Password tab in User Settings
 - don’t allow login with username/password for Git over HTTP requests
 - render 404 on requests to Profiles::PasswordsController

Signed-off-by: NRémy Coutable <remy@rymai.me>

Signed-off-by: NRémy Coutable <remy@rymai.me>

A `performance_team` Flipper group has been created. By default this
group is nil but this can be customized in `gitlab.yml` via the
performance_bar.allowed_group setting.
Signed-off-by: NRémy Coutable <remy@rymai.me>

+ fix wrong test setup

in favor of whitelist that will be used to
control the access to monitoring resources

* implemented logging of project and system web hooks
* implemented UI for user area (project hooks)
* implemented UI for admin area (system hooks)
* implemented retry of logged webhook
* NOT imeplemented log remover

[ci skip]

Setting `usage_ping_enabled` to false in `gitlab.yml`:

1. Disables the usage ping, regardless of the value stored in the database.
2. Prevents the usage ping from being enabled through the admin panel. It can
   only be enabled by either removing the line from `gitlab.yml` and configuring
   through the admin panel, or setting it to true in `gitlab.yml`.

GitLab uses the import_project method in GitLab Shell,
This method uses a timeout for the operation, hardcoded to 800 seconds.
With this MR the timeout is now configurable in the gitlab_shell
settings.