Increase default width even more

I think this is the third time I've changed this. The sidebar keeps
getting bigger. We might need to compute this dynamically when it's
unset, to ensure four columns of results regardless of theme or filename
length.
properties-window: set max-width for value labels

Not setting it can lead to very wide windows, because gtk doesn't
enforce a maximum window size anymore.

https://bugzilla.gnome.org/show_bug.cgi?id=732117
nautilus-file-operations: Use mount name if available

Currently custom_basename_to_string uses the base name or display name
of the files for the copying and moving dialog.
In the cases of unlabeled removable drives, the name is a code, showing
in the dialog a not very friendly name.
gtkplacessidebar and nautilus-pathbar uses the mount name retrieved by
g_mount_name if available.
Use that fir the operations dialogs as well to display a more friendly
name to the user and to be consistent with the sidebar and pathbar name.

https://bugzilla.gnome.org/show_bug.cgi?id=738087
application: Restore --new-window functionality

In case of no further arguments, open home folder. Commit
4e192481 "application: minimal port to handle_local_options()"
removed this, presumably accidentally. It makes clicking the "Files"
from favorites do nothing if Nautilus is already running (and it
always is running in classic mode as it handles desktop).

https://bugzilla.gnome.org/show_bug.cgi?id=738280
Updates Persian Translations
Merge remote-tracking branch 'upstream/master'