Merge branch 'edit-button-wiki' into 'master'

Fix edit button in wiki

## What does this MR do?

Fix edit button in wiki.

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

## Why was this MR needed?

## Screenshots (if relevant)

### Show Wiki

![wiki_show](/uploads/7633b7de9921cb8abe688a11883b8d1d/wiki_show.png)

### Edit Wiki

![wiki_edit](/uploads/2529bb1d5eb5b33ef97da89e634bb8ad/wiki_edit.png)

## Does this MR meet the acceptance criteria?

- [x] [CHANGELOG](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/CHANGELOG.md) 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 [merge request performance guides](http://docs.gitlab.com/ce/development/merge_request_performance_guidelines.html)
- [ ] 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 it does - rebase it please)
- [ ] [Squashed related commits together](https://git-scm.com/book/en/Git-Tools-Rewriting-History#Squashing-Commits)

## What are the relevant issue numbers?

Closes #13444

See merge request !7143

CHANGELOG.md

@@ -13,6 +13,7 @@ Please view this file on the master branch, on stable branches it's out of date.
 - Fail gracefully when creating merge request with non-existing branch (alexsanford)
 - Fix mobile layout issues in admin user overview page !7087
 - Fix HipChat notifications rendering (airatshigapov, eisnerd)
+- Remove 'Edit' button from wiki edit view !7143 (Hiroyuki Sato)
 - Refactor Jira service to use jira-ruby gem
 - Improved todos empty state
 - Add hover to trash icon in notes !7008 (blackst0ne)

app/views/projects/wikis/_form.html.haml

@@ -33,7 +33,12 @@
   .form-actions
     - if @page && @page.persisted?
       = f.submit 'Save changes', class: "btn-save btn"
-      = link_to "Cancel", namespace_project_wiki_path(@project.namespace, @project, @page), class: "btn btn-cancel"
+      .pull-right
+        - if can?(current_user, :admin_wiki, @project)
+          = link_to namespace_project_wiki_path(@project.namespace, @project, @page), data: { confirm: "Are you sure you want to delete this page?"}, method: :delete, class: "btn btn-danger btn-grouped" do
+            Delete
+        = link_to "Cancel", namespace_project_wiki_path(@project.namespace, @project, @page), class: "btn btn-cancel btn-grouped"
     - else
       = f.submit 'Create page', class: "btn-create btn"
-      = link_to "Cancel", namespace_project_wiki_path(@project.namespace, @project, :home), class: "btn btn-cancel"
+      .pull-right
+        = link_to "Cancel", namespace_project_wiki_path(@project.namespace, @project, :home), class: "btn btn-cancel"

app/views/projects/wikis/_main_links.html.haml

@@ -7,6 +7,3 @@
   - if can?(current_user, :create_wiki, @project)
     = link_to namespace_project_wiki_edit_path(@project.namespace, @project, @page), class: "btn" do
       Edit
-  - if can?(current_user, :admin_wiki, @project)
-    = link_to namespace_project_wiki_path(@project.namespace, @project, @page), data: { confirm: "Are you sure you want to delete this page?"}, method: :delete, class: "btn btn-remove" do
-      Delete

app/views/projects/wikis/edit.html.haml

@@ -19,7 +19,5 @@
         - if can?(current_user, :create_wiki, @project)
           = link_to '#modal-new-wiki', class: "add-new-wiki btn btn-new", "data-toggle" => "modal" do
             New Page
-      = render 'main_links'
-
 
   = render 'form'