single site install issues

[beck]

• Can't roll back a theme
• The theme link is using a broken in-window popup instead of a new window linking to github
• Some styling would be nice to distinguish github vs standard themes

[scarstens]

github_theme_update_row() function is not loading properly (for me) which is whats causing the roll back and "broken" popup window. There must be a problem with the following code currently on lines 62-63:

    remove_action( "after_theme_row_" . $theme['Stylesheet'], 'wp_theme_update_row');
    add_action( "after_theme_row_" . $theme['Stylesheet'], 'github_theme_update_row', 11, 2 );