Handle browser interruption exit

[finesden33]

Currently, the program doesn't handle when a user exits the browser/closes the tab for user authentication (for uploading a saved playlist).
It should detect when the user does this and resume the program with a notification acknowledging the interrupt, instead of causing the program to get stuck waiting forever (forcing the user to have to close the program, which risks losing the playlist data they retrieved if they haven't saved it yet)