Increase the limit of posts in the Top Post widget.



git-svn-id: https://plugins.svn.wordpress.org/jetpack/trunk@756771 b8457f37-d9ea-0310-8a92-e5e31aec5664
Wrap sharing page in new class.



git-svn-id: https://plugins.svn.wordpress.org/jetpack/trunk@756772 b8457f37-d9ea-0310-8a92-e5e31aec5664