Blender Git Loki

File Bookmarks: use volume label on Windows, and set name of recent entries
from system/user bookmarks' name if possible.

Volume label on Windows was request from T46083, makes Blender more in line
with 'common' filebrowsing on this OS.

And now, we automatically set name of recent entries from the bookmarks, if path
can be found there, more consistent too from user PoV.