Merge request header markup now matches issue markup for consistancy

app/views/projects/merge_requests/_show.html.haml

 - page_title           "#{@merge_request.title} (#{@merge_request.to_reference})", "Merge Requests"
 - page_description     @merge_request.description
 - page_card_attributes @merge_request.card_attributes
-
-= render "header_title"
+- header_title project_title(@project, "Merge Requests", namespace_project_merge_requests_path(@project.namespace, @project))
 
 - if params[:view] == 'parallel'
   - fluid_layout true

app/views/projects/merge_requests/show/_mr_title.html.haml

-.detail-page-header
-  .status-box{ class: status_box_class(@merge_request) }
+.clearfix.detail-page-header
+  .issuable-header
+    .issuable-status-box.status-box{ class: "#{status_box_class(@merge_request)}" }
+      = icon(@merge_request.state_icon_name, class: "hidden-sm hidden-md hidden-lg")
       %span.hidden-xs
         = @merge_request.state_human_name
-    %span.hidden-sm.hidden-md.hidden-lg
-      = icon(@merge_request.state_icon_name)
-  %a.btn.btn-default.pull-right.visible-xs-block.gutter-toggle.js-sidebar-toggle{ href: "#" }
+
+    %a.btn.btn-default.pull-right.visible-xs-block.gutter-toggle.issuable-gutter-toggle.js-sidebar-toggle{ href: "#" }
       = icon('angle-double-left')
-  .issue-meta
+      
+    .issuable-meta
       %strong.identifier
-      %span.hidden-sm.hidden-md.hidden-lg
-        MR
-      %span.hidden-xs
-        Merge Request
-      !#{@merge_request.iid}
-    %span.creator
+        Merge Request #{@merge_request.to_reference}
       opened
-      .editor-details
       = time_ago_with_tooltip(@merge_request.created_at)
       by
       %strong
         = link_to_member(@project, @merge_request.author, size: 24, mobile_classes: "hidden-xs")
-        %strong
-          = link_to_member(@project, @merge_request.author, size: 24, mobile_classes: "hidden-sm hidden-md hidden-lg",
-            by_username: true, avatar: false)
+        = link_to_member(@project, @merge_request.author, size: 24, mobile_classes: "hidden-sm hidden-md hidden-lg", by_username: true, avatar: false)
 
-  .issue-btn-group.pull-right
   - if can?(current_user, :update_merge_request, @merge_request)
+    .issuable-actions
+      .clearfix.issue-btn-group.dropdown
+        %button.btn.btn-default.pull-left.hidden-md.hidden-lg{ data: { toggle: "dropdown" } }
+          %span.caret
+          Options
+        .dropdown-menu.dropdown-menu-align-right.hidden-lg
+          %ul
+            - if @merge_request.open?
+              %li
+                = link_to 'Close', merge_request_path(@merge_request, merge_request: { state_event: :close }), method: :put, title: 'Close merge request'
+              %li
+                = link_to 'Edit', edit_namespace_project_merge_request_path(@project.namespace, @project, @merge_request), class: 'issuable-edit', id: 'edit_merge_request'
+            - if @merge_request.closed?
+              %li
+                = link_to 'Reopen', merge_request_path(@merge_request, merge_request: {state_event: :reopen }), method: :put, class: 'reopen-mr-link', title: 'Reopen merge request'
         - if @merge_request.open?
-        = link_to 'Close', merge_request_path(@merge_request, merge_request: { state_event: :close }), method: :put, class: 'btn btn-nr btn-grouped btn-close', title: 'Close merge request'
-        = link_to edit_namespace_project_merge_request_path(@project.namespace, @project, @merge_request), class: 'btn btn-nr btn-grouped issuable-edit', id: 'edit_merge_request' do
+          = link_to 'Close', merge_request_path(@merge_request, merge_request: { state_event: :close }), method: :put, class: 'hidden-xs hidden-sm btn btn-nr btn-grouped btn-close', title: 'Close merge request'
+          = link_to edit_namespace_project_merge_request_path(@project.namespace, @project, @merge_request), class: 'hidden-xs hidden-sm btn btn-nr btn-grouped issuable-edit', id: 'edit_merge_request' do
             = icon('pencil-square-o')
             Edit
         - if @merge_request.closed?
-        = link_to 'Reopen', merge_request_path(@merge_request, merge_request: {state_event: :reopen }), method: :put, class: 'btn btn-nr btn-grouped btn-reopen reopen-mr-link', title: 'Reopen merge request'
+          = link_to 'Reopen', merge_request_path(@merge_request, merge_request: {state_event: :reopen }), method: :put, class: 'hidden-xs hidden-sm btn btn-nr btn-grouped btn-reopen reopen-mr-link', title: 'Reopen merge request'