Ubuntu 20.04 file browser showing all zfs mounts explicitly in side-panel

I have installed Ubuntu 20.04 on zfs. I had previously had zfs datasets mounted into my 18.04 system. Those mounts are all working in the new system, but they are displaying as mounts in my file browser with unmount buttons next to them. I certainly don't want this function. it is also cluttering my display. It appears similar to Bug 1691908.

My zfs mounts are not removable volumes, they are not in fstab.

I was advised to report the output of `gio mount -li`:

```
Volume(0): efi
  Type: GUnixVolume
  ids:
   uuid: '8799-8F8E'
  themed icons: [drive-removable-media]
  symbolic themed icons: [drive-removable-media-symbolic]
  can_mount=1
  can_eject=0
  should_automount=1
  Mount(0): efi -> file:///boot/efi
    Type: GUnixMount
    default_location=file:///boot/efi
    themed icons: [drive-harddisk]
    symbolic themed icons: [drive-harddisk-symbolic]
    can_unmount=1
    can_eject=0
    is_shadowed=0
Mount(1): SPACE -> file:///media/peterg/SPACE
  Type: GUnixMount
  default_location=file:///media/peterg/SPACE
  themed icons: [drive-harddisk]
  symbolic themed icons: [drive-harddisk-symbolic]
  can_unmount=1
  can_eject=0
  is_shadowed=0
```

I tried Ask-Ubuntu. No answers at this time:
https://askubuntu.com/questions/1280941/ubuntu-20-04-file-browser-showing-all-zfs-mounts-explicitly-in-side-panel

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: nautilus 1:3.36.3-0ubuntu1
ProcVersionSignature: Ubuntu 5.4.0-49.53-generic 5.4.65
Uname: Linux 5.4.0-49-generic x86_64
NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair nvidia_modeset nvidia
ApportVersion: 2.20.11-0ubuntu27.10
Architecture: amd64
CasperMD5CheckResult: skip
Date: Fri Oct 9 08:41:22 2020
GsettingsChanges:

InstallationDate: Installed on 2020-10-01 (6 days ago)
InstallationMedia: Ubuntu 20.04.1 LTS "Focal Fossa" - Release amd64 (20201001)
ProcEnviron:
 LANGUAGE=en_AU:en
 TERM=xterm-256color
 PATH=(custom, no user)
 LANG=en_AU.UTF-8
 SHELL=/bin/bash
SourcePackage: nautilus
UpgradeStatus: No upgrade log present (probably fresh install)
usr_lib_nautilus: