Add Multiple Separator Options to Allow for Combinations of Separator Characters

When generating a password, the "Separated By" drop down allows us to choose one of several separators that will be used throughout the entire password. This functionality is good but I think it can be made better by adding a "multi" option that randomly picks a different separator character between each word.

For example if the current separator is "Underscore" then the password would be "Correct_horse_battery_staple". Swiching to the "multi" option would result in a password like "Correct_horse,battery$staple", or "Correct-horse.battery staple" or "Correct$horse#battery_staple" etc.