Rename variable.
Validate dropped file before saving; Prep. for saving by proper name.
Create get_rom_key function.
Have user try again when dropped ROM fails to validate.
Rename functions.
Validate and then save AJAX-fetched ROMs the same as dropped ROMs.
Make callback function names more meaningful.
Move AJAX ROM-fetch logic into discreet functions.
Create function for flagging a ROM as default.
Check if default ROM is set, and try using it.
Re-use similar function.
Reduce duplication and rephrase message.
Reduce duplication.
Rename function.
Save default ROM to load info to file system.
Rename property.
Change filename of config file.
Make log messages more helpful.
Rename functions to be more distinguished from similarly named functions.
Prevent re-reading and already read file.