Change "Get Patch" buttons to dropdowns orffering patches and diffs

app/views/commits/_commit_box.html.haml

@@ -5,9 +5,14 @@
         %span.btn.disabled.grouped
           %i.icon-comment
           = @notes_count
-      = link_to project_commit_path(@project, @commit, format: :patch), class: "btn small grouped" do
+      .left.btn-group
+        %a.btn.small.grouped.dropdown-toggle{ data: {toggle: :dropdown} }
           %i.icon-download-alt
-        Get Patch
+          Download as
+          %span.caret
+        %ul.dropdown-menu
+          %li= link_to "Email Patches", project_commit_path(@project, @commit, format: :patch)
+          %li= link_to "Plain Diff",    project_commit_path(@project, @commit, format: :diff)
       = link_to project_tree_path(@project, @commit), class: "browse-button primary grouped" do
         %strong Browse Code »
     %h3.commit-title.page_title

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

@@ -13,9 +13,14 @@
           = "MERGED"
     - if can?(current_user, :modify_merge_request, @merge_request)
       - if @merge_request.open?
-        = link_to project_merge_request_path(@project, @merge_request, format: :patch), class: "btn grouped" do
+        .left.btn-group
+          %a.btn.grouped.dropdown-toggle{ data: {toggle: :dropdown} }
             %i.icon-download-alt
-          Get Patch
+            Download as
+            %span.caret
+          %ul.dropdown-menu
+            %li= link_to "Email Patches", project_merge_request_path(@project, @merge_request, format: :patch)
+            %li= link_to "Plain Diff",    project_merge_request_path(@project, @merge_request, format: :diff)
 
         = link_to 'Close', project_merge_request_path(@project, @merge_request, merge_request: {closed: true }, status_only: true), method: :put, class: "btn grouped danger", title: "Close merge request"