Fix jumbotron in index collection

src/templates/projects/landing.pug

@@ -1,6 +1,8 @@
 | {% extends 'layout.html' %}
 include ../../../../pillar/src/templates/mixins/components
 
+| {% set title = 'landing' %}
+
 | {% import 'projects/_macros.html' as projectmacros %}
 | {% from '_macros/_asset_list_item.html' import asset_list_item %}
 
@@ -100,7 +102,7 @@ link(href="{{ url_for('static_cloud', filename='assets/css/project-main.css') }}
 			section.py-5
 				h2.pb-3.text-center Gallery
 
-				.gallery
+				.gallery.mx-auto
 					| {% for n in activity_stream %}
 					| {% if n.node_type not in ['comment', 'post'] and n.picture %}
 					.thumbnail.expand-image-links