Feature Request: Custom post types for “Blog” page determination

Dear ThinkUp Team,
I really like your theme so far – I’m actually using Minamaze Boxed, because I like that particular layout a lot. But here I’m writing about base functionality of Minamaze:
In Theme Customizer it is possible to set a certain layout type (full page / left sidebar / right sidebar) based on page types. I would like to suggest an advanced option here: “Blog” pages are currently only determined by the content type ‘post’ in admin/main/options/00theme_setup.php > thinkup_check_isblog()
Sadly I’m using a plugin that defines a custom content type similar to a post (let’s call it postABC) and of course I would like to make postABC archive pages look the same as post archive pages (Blog pages).
I would appreciate a little text box like “Post types for Blog pages (comma-separated list)”. Or even a multi-select box pre-filled with the actual content types in the database. That way users could easily add postABC to have the general archive page layout, too. These settings won’t vanish with every update like the ones I made to the source code for now as a workaround…

return (
        ( is_home() || is_archive() )
        && ( <$post_type is in the comma-separated list> )
    ) ? true : false ;

Cheers,
Jan