app/views/layouts/_modal_form_layout.html.erb
<div class="modal-header">
<button type="button" class="close" data-dismiss="modal"><span aria-hidden="true">×</span><span class="sr-only">Close</span></button>
<h4 class="modal-title" id="myModalLabel"><%= modal_title %></h4>
</div>
<div class="modal-body">
<%= yield %>
</div>
<div class="modal-footer">
<button type="button" class="btn btn-default" data-dismiss="modal">Close</button>
<button type="button" class="btn btn-primary" id="submit-modal" data-submitting="<%= submitting_text %>"><%= submit_text %></button>
</div>