add loading text for form submit buttons

app/views/start_form/completed.html.erb

@@ -1,5 +1,5 @@
 <p>
   Form has been submitted alredy by ypu - thanks!
 </p>
-<%= button_to button_title('Send copy to Email'), send_submission_email_index_path, params: { template_slug: @template.slug, email: params[:email] }, form: { onsubmit: 'event.submitter.disabled = true' } %>
+<%= button_to button_title(title: 'Send copy to Email', disabled_with: 'Sending'), send_submission_email_index_path, params: { template_slug: @template.slug, email: params[:email] }, form: { onsubmit: 'event.submitter.disabled = true' } %>
 <%# do not allow donwload for securetiy reaosn<a href="">Download documets</a> %>

app/views/start_form/show.html.erb

@@ -5,5 +5,5 @@ You have been invited to submit template <%= @template.name %>
     <%= f.label :email %>
     <%= f.email_field :email, required: true %>
   </div>
-  <%= f.button button_title %>
+  <%= f.button button_title(title: 'Confirm', disabled_with: 'Processing') %>
 <% end %>