lots of references have to be kept and passed around because once the
device is removed Solid::Device is just an UDI - anything else is
obtained dynamically and will return invalid results (even casts will
not work)
what the mountpoint cleaner does? when a device is removed without
being unmounted (e.g. USB storage) the program will call `unmount`
essentially making sure the device node and the mount point can be used
when the device is inserted again, no other project does that as far as
I am aware
Signed-off-by: Ivailo Monev <xakepa10@gmail.com>
