Feature Request: Change Path of Devices

[benengele]

Problem:
It's not possible to recover plots if device path has changed, e.g. because:

• Connection changed resulting in change of /dev/sdX
• Failing disk has been cloned to a new disk resulting in change of /dev/disk/by-id/...
• Disk has been added using /dev/sdX path accidentally

Suggested solution:
Add device will check UUIDs of files existing in geometry and change the path of the device instead of only supporting re-formatting the disk.

[benengele]

Would also address the problem mentioned in last comment of #17