Add default delete modal usage:

- <%= render 'layouts/delete_modal', delete_options: {title: '', warning: '', cancel: '', submit: '' } %>
 - in default index, just set title, warning, cancel and submit in quick_edit if needed

app/views/layouts/_delete_modal.html.erb

@@ -0,0 +1,13 @@
+<div id="dialog" class="modal hide" tabindex="-1" role="dialog" aria-labelledby="delete_modal" aria-hidden="true">
+  <div class="modal-header">
+    <button type="button" class="close" data-dismiss="modal" aria-hidden="true">×</button>
+    <h3><%= (delete_options[:title] rescue nil) || t(:delete_) %></h3>
+  </div>
+  <div class="modal-body">
+    <span class="text-warning text-center"><%= (delete_options[:warning] rescue nil) || t(:delete_warning) %></span>
+  </div>
+  <div class="modal-footer">
+    <button class="btn" data-dismiss="modal" aria-hidden="true"><%= (delete_options[:cancel] rescue nil) || t(:close) %></button>
+    <%= link_to ((delete_options[:submit] rescue nil) || t(:delete_)), nil, class: "delete-item btn btn-danger", method: :delete %>
+  </div>
+</div>