Allow importing and exporting of settings. #112
Description
It would be nice to be able to import and export the settings, including the various player settings if they have any.
On that note, inclusion of an option to be able to have mpv.conf and input.conf when using mpv player would be nice. If there are no options or ui cannot be adjusted to include those options, for starters, if you could import and export settings then one could still use mpv.conf and input.conf if desired.