Allow root of filesystem as image destination

[TheCarpetMerchant]

When choosing a folder to mount as a destination for the images generated, please allow either the selection of the root of a partition or the creation of a folder. Right now the only option is to abort, boot another OS, create a folder and go back to clonezilla.

[stevenshiau]

Clonezilla is a console mode program, so you need some more steps.
You can switch to another console (say console 2) by pressing ctrl-alt-F2, and create mount the device, create the directory.
Then Just quit the Clonezilla live main menu in console 1 (ctrl-alf-F1), and return to the main menu by logout (or exit), mount the image repo again.