Put h1 title on the top center of login page

Author: yasulab

app/views/login_page/index.html.haml

@@ -1,7 +1,7 @@
 %body
   %header.intro-header{:style => "padding-top: 300px; background-image: url('cover.png')"}
 
-= scrivito_tag :h1,  @obj, :title
+%h1{:style => "text-align: center; margin-top: -30px; padding-bottom: 20px;"} ログイン
 = scrivito_tag :div, @obj, :body
 = form_tag session_path, role: 'form' do
   .form-group