Default to 'Yes' for [Y/n] prompts

[MDornacher]

Hello,

I've just installed this project and noticed that the [Y/n] prompts don't default to "Y" as I would have expected.

The changes are small:

1. Added a check to see if the user input is empty.
2. If the input is empty, the script now defaults to 'Y'.

Cheers, Manuel