Move menu_action_ok of MENU_FILE_DIRECTORY and MENU_FILE_CARCHIVE
over to menu_entries_cbs.c
(menu_entries_cbs.c) Implement action_ok_config_load
Refactor menu_entries_cbs_init_bind_ok
Create action_ok_set_path in menu_entries_cbs.c
Move MENU_FILE_PLAIN action OK handling over to menu_entries_cbs.c
Get rid of menu_parse_check function call in menu_action_ok
Get rid of HAVE_SHADER_MANAGER definition in menu_common_backend.c
use menu_set_navigation after a keyboard search instead of modifying
menu->selection_ptr directly.