(Menu) Add more settings
(Menu) Refactor more settings
(Menu) Refactor slowmotion_ratio
(Menu) Refactor MENU_SETTINGS_OVERLAY_ENABLE
(Menu) Refactor WINDOW_SCALE_X/Y settings
(Menu) Refactor MONITOR_INDEX setting
Just expose all aspect ratios - some users want these weird ratios
(Menu) Refactor fastforward_ratio setting
(Menu) Refactor aspect_ratio_idx setting
(Menu) Refactor input_autodetect_enable
(Lakka) theme switching
(Lakka) Use theme font
Ifdef netplay options
Make find_resampler_driver more robust
Use correct resampler fallback.
Drop misleading "fallback" path for input drivers.

The codepath cannot be hit anyways due to checks in find_input_driver().
(Settings data) Add default audio resampler option
Copy def_audio_resampler, not def_audio.
(Settings data) Nit
Make init_video_input more robust - just failing the entire program
like this instead of defaulting to sane defaults is unacceptable