`index_simple.json` support dropped from `cs\Index` (was used for menu generation, now menu generation is done by module itself).
`cs\Index::$init_auto` and `cs\Index::$title_auto` removed.
`cs\Index::$route_ids` and `cs\Index::$route_paths` are filled much earlier (before module's) index.php file inclusion).
`cs\Index::init()` removed, realization simplified and separated into `::normalize_route()` and `::module_page_rendering()` methods.
`save.php` files support removed.
Some other refactoring and simplification.
More simplifications in `cs\Index`.
`$_POST['edit_settings']` replaced by separate `$_POST['apply']` and similar for other actions.
`cs\Index::$post_buttons` renamed into `::$custom_buttons`