[computer:// backend] Shorten display name
computer:// generates display name of the mountable location as "
(Partition name)". This is counterintuitive as such sub-categories are mostly handled as folders when dealing with files, and it does not match with names on "Places" which exists for many file managers. (Nautilus : "Other Locations", Dolphin,PCManFM,Thunar : "Places" on sidebar)
Suggestion : Display names should agree with names on "Places" at least most of the time. Put device info on filename, which is hidden most of the time. Current implementation puts arbitrary integer on filename to give uniqueness, which can change anytime and break link if storage configuration changes. We can fix this by replacing one with other unique information.