Fix broken test

There were two problems here:

1. On the JS side, the reference to $widgetBody didn't refer to the
   right DOM element any more. This might be because it was replaced by
   the `getMergeStatus` method. Even if it wasn't, ensuring we have the
   right element means that the content gets updated.

2. On the Ruby side, the `log_merge_error` method didn't update the
   `merge_error` column of the merge request. Change that to update if
   requested, and update in the most common cases by default.

   Additionally, this would sometimes return an error hash, but it
   doesn't look like this was ever used (the return value of
   `MergeService#execute` appears to be unused everywhere).

Also update repo restorer to use project wiki method.

There are two problems in the current implementation:

1. If a project is marked for deletion via the `pending_delete` flag
and then the namespace was quickly deleted, it's possible that the
namespace skips over that project and leaves that project in
an orphaned state.

2. Before namespace deletion, the namespace attempts to clean up
all the relevant storage paths. However, if all projects have been
removed synchronously, then the namespace will not be able to clean anything.
To prevent this, we should load the paths to be deleted before
actually destroying projects.

The specs were missing this second case due to a permission issue
that caused project removal never to happen.

Add tests

Adds folder name in the top of the table

Closes https://gitlab.com/gitlab-org/gitlab-ce/issues/20305

Fix for XSS vulnerability in SVG attachments

See https://dev.gitlab.org/gitlab/gitlabhq/merge_requests/2059

Fix XSS in rdoc and other markups

See https://dev.gitlab.org/gitlab/gitlabhq/merge_requests/2058

Add sanitization filter to asciidocs output to prevent XSS

See https://dev.gitlab.org/gitlab/gitlabhq/merge_requests/2057

Closes https://gitlab.com/gitlab-org/gitlab-ce/issues/24036

Fixes #23895.

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

CreateTagService and DeleteTagService where in root namespace, by
following service code organization I moved them in Tags::CreateService
and Tags::DestroyService

It consolidates these endpoints:
 - /projects
 - /projects/owned
 - /projects/visible
 - /projects/starred
 - /projects/all

Into the /projects endpoint using query parameters.

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

* Add a new DestroyService for Wiki Pages
* Alter WikiPagesController to use the new service

* Alter wiki_pages factory with custom creation operation

* Add WikiPage#id method returning associated SHA for wiki page commit

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

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