jquery: Scale small avatars the same as regular ones

Avatars of comments that were originally submitted as threaded/nested
comments are sized 39px instead of 68px. For a consistent layout,
render these at the same size as others.

https://blog.jquerymobile.com/2011/06/14/jquery-mobile-update-week-of-june-13/

Ref jquery/infrastructure-puppet#17.

Author: Krinkle

themes/jquery/css/blog.css

@@ -63,6 +63,8 @@
 	padding: 0;
 	position: absolute;
 	top: 0;
+	width: 68px;
+	max-height: 68px;
 }
 a.comment-reply-link {
 	background: #eee;