Releasing 1.2.3

git-svn-id: https://plugins.svn.wordpress.org/addthis-welcome/trunk@856407 b8457f37-d9ea-0310-8a92-e5e31aec5664
Minor bug fix

git-svn-id: https://plugins.svn.wordpress.org/addthis-welcome/trunk@857055 b8457f37-d9ea-0310-8a92-e5e31aec5664