Add option to 'confirm exit' when closing mp3tag

Add option to 'confirm exit' when closing mp3tag

Title says it all. When closing mp3tag with the close button of Windows a prompt box can show asking the user "Exit, are you sure?" yes/no

Option would sit nicely under 'General' of the mp3tag options.

It's a considerate feature but I'm not pushing for this feature ATM as like Im pusging formy requested and desire of tag 'highlighting of changes'