Folders system in disk explorer at startup

[JasonNumberThirteen]

It's a small feature, but I think is worth attention. To keep all projects organized in root folder, I suggest to put also a folder detection with opening to let user decide where would like to insert his disk, modified or created from scratch. Of course, it would be comfortable to also code an option to add another folder by clicking the "+" button which right now is usable to creating disks.