Switch render method

There were still some reference to the base Controller page renderer
that needed to switched to the new Render class. Oops.

Also for got mention tabler icons (https://tabler-icons.io/) were added
in the last commit. They are so nice.

templates/back/locations.twig

@@ -8,9 +8,9 @@
 			<h1>
 				Location Listing
 			</h1>
-			{% if notice is defined %}
+			{% if options.notice is defined %}
 				<div role="system-notice">
-					{{ notice }}
+					{{ options.notice }}
 				</div>
 			{% endif %}