Add missing translations

app/views/admin/user_attribute_models/index.html.erb

@@ -7,7 +7,7 @@
 	<ul>
 		<li class="list_head clear">
 			<span class="<%= @attribute %>s"><%= t("admin.#{@attribute}") %></span>
-			<span class="action">Action</span>
+			<span class="action"><%= t('admin.action') %></span>
 		</li>
 		<% @user_attribute_models.each do |user_attribute_model| %>
 		<li id="attribute_<%= user_attribute_model.id %>" class="list_item <%= "#{user_attribute_model.is_disabled? ? 'disable' : ''}" %> clear">