changed the opacity of the socialmedia buttons

git-svn-id: file:///var/www/svn/anahita/anahita/branches/search@17026 a933e228-e664-4d3f-8241-49479697c698
unsets the default

git-svn-id: file:///var/www/svn/anahita/anahita/branches/search@17027 a933e228-e664-4d3f-8241-49479697c698