Added global remaining daily messages across services to ui

app/templates/main_nav.html

@@ -26,11 +26,15 @@
     <li><a class="govuk-link govuk-link--no-visited-state{{ main_navigation.is_selected('team-members') }}" href="{{ url_for('.manage_users', service_id=current_service.id) }}">Team members</a></li>
   {% endif %}
   </ul>
-</nav>
+</nav><br>
     <div>
-        <p>Messages Left / Daily Limit</p>
+        <p class="govuk-body">Messages Left / Daily Limit</p>
         <ul>
-            <li>{{ side_nav_remaining_messages }} / {{ current_service.message_limit }}</li>
+            <li>{{ daily_remaining_messages }} / {{ current_service.message_limit }}</li>
+        </ul><br>
+        <p class="govuk-body">Messages Left Across Services</p>
+        <ul>
+            <li>{{ daily_global_messages_remaining }}</li>
         </ul>
     </div>
 {% endif %}