.Trash-<uid> ignored for ZFS filesystem mountpoints

[Karl-Philipp Richter]

Both the icon (full/empty) and the content of the `.Trash-<uid>` folder under the mountpoint of a ZFS filesystem are ignored by the `nautilus` trash.

Steps to reproduce:

 1. create a test pool

        truncate -s 2G /tmp/test.img
        sudo zpool create test /tmp/test.img
        sudo chown $USER:$USER /test
        touch /test/a

 2. open `/test` in `nautilus` and delete the file `a`
 3. check the trash icon and the trash content

ProblemType: Bug
DistroRelease: Ubuntu 14.10
Package: nautilus 1:3.10.1-0ubuntu15
Uname: Linux 3.16.7-031607-generic x86_64
NonfreeKernelModules: zfs zunicode zavl zcommon znvpair
ApportVersion: 2.14.7-0ubuntu8
Architecture: amd64
CurrentDesktop: Unity
Date: Sun Nov 9 00:48:01 2014
GsettingsChanges: b'org.gnome.nautilus.list-view' b'default-column-order' b"['name', 'size', 'type', 'date_modified', 'date_accessed', 'owner', 'group', 'permissions', 'mime_type', 'where']"
SourcePackage: nautilus
UpgradeStatus: No upgrade log present (probably fresh install)

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.