get_theme_feature_list() replaces install_themes_feature_list(). Does...

get_theme_feature_list() replaces install_themes_feature_list().  Does translation and works if feature_list is not accessible from api.wordpress.org. see #14936

git-svn-id: https://core.svn.wordpress.org/trunk@15655 1a063a9b-81f0-0310-95a4-ce76da25c4cd