UI Landing: Fix alignment on Firefox.

Thanks Ines for the report!

src/templates/projects/landing.pug

@@ -165,10 +165,11 @@ link(href="{{ url_for('static_cloud', filename='assets/css/project-main.css') }}
 					| {% endif %}
 					| {% endfor %}
 
-		.text-center.mx-auto.py-3
+			.clearfix
-			a.btn.btn-outline-primary.px-5(
+				.text-center.mx-auto.py-3
-				href="{{ project_browse_url }}")
+					a.btn.btn-outline-primary.px-5(
-				| See More Artwork
+						href="{{ project_browse_url }}")
+						| See More Artwork
 
 
 	.row.mt-5