[Wishlist] Offer a Folders Popup legacy setting option when installing

This would be separate program executed on demand (at QAP installation or later) or a feature included in QAP. I don’t know yet.

This feature will read the FoldersPopup.ini file (asking the user to identify this file or looking at the startup shortcut to get the FP working directory) and will rewrite the QuickAccessFolder.ini file according to its new structure.