Show avatars in merge widget and fix mr download button overflow

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

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

@@ -22,9 +22,8 @@
           %span into
           %strong.label-branch #{@merge_request.target_branch}
         - if @merge_request.open?
-          %span.pull-right
-            .btn-group
-              %a.btn.dropdown-toggle{ data: {toggle: :dropdown} }
+          .btn-group.btn-group-sm.pull-right
+            %a.btn.btn-sm.dropdown-toggle{ data: {toggle: :dropdown} }
               = icon('download')
               Download as
               %span.caret

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

@@ -13,7 +13,7 @@
       %h4
         Rejected
         - if @merge_request.closed_event
-          by #{link_to_member(@project, @merge_request.closed_event.author, avatar: false)}
+          by #{link_to_member(@project, @merge_request.closed_event.author, avatar: true)}
           #{time_ago_with_tooltip(@merge_request.closed_event.created_at)}
       %p Changes were not merged into target branch
 
@@ -21,7 +21,7 @@
       %h4
         Accepted
         - if @merge_request.merge_event
-          by #{link_to_member(@project, @merge_request.merge_event.author, avatar: false)}
+          by #{link_to_member(@project, @merge_request.merge_event.author, avatar: true)}
           #{time_ago_with_tooltip(@merge_request.merge_event.created_at)}
       = render "projects/merge_requests/show/remove_source_branch"