Use correct aspect-ratio for shot thumbnails.

src/templates/attract/shots/for_project.jade

@@ -36,7 +36,8 @@
 						href="{{ url_for('attract.shots.perproject.view_shot', project_url=project.url, shot_id=shot._id) }}",
 						class="status-{{ shot.properties.status }} shot-link")
 						img(src="{{ shot._thumbnail }}",
-							alt="Thumbnail",width="110",height='60')
+							alt="Thumbnail",
+							style='width: 110px; height: {{ shot._thumbnail_height }}')
 				.table-cell.shot-name
 					a(
 						data-shot-id="{{ shot._id }}",