Deleting starred files leaves behind starred file named ""

Affected version

Nightly flatpak: Can't test it because with the Flatpak installed, the Ubuntu 19.10 Desktop is broken (just shows a grey background for the Desktop after login, no interaction with the Dock or panel are possible)
Other: Ubuntu 19.10 beta (amd64), gnome-shell 3.34.0-1ubuntu1, Nautilus 1:3.34.0-1ubuntu1

Steps to reproduce

Star any file
Verify the file is listed in Starred as expected
Delete the original file

Current behavior

Deleting a file that is Starred leaves behind an object "" in Starred.

Expected behavior

Deleting a file that is Starred removes any traces to this file from Starred, or removal of files which are still listed in Starred is prevented.

Additional information

It does not matter whether the file is first moved to Trash, then Trash expunged, or whether the file is immediately deleted using Shift-Delete or external ways of interacting with FSO's (e.g. 'rm' on the CLI).

This issue was originally reported against Nautilus in Ubuntu on Launchpad.

<!--
    Please test if the issue has already been fixed in the Nightly version.

You can install the Nightly version in parallel with the regular version with these instructions:

1. Make sure that Flatpak is installed (see https://flatpak.org/setup )
    2. Copy and run the following command in a Terminal:

flatpak install --from https://nightly.gnome.org/repo/appstream/org.gnome.NautilusDevel.flatpakref

-->

# Affected version
- Nightly flatpak: Can't test it because with the Flatpak installed, the Ubuntu 19.10 Desktop is broken (just shows a grey background for the Desktop after login, no interaction with the Dock or panel are possible)
- Other: Ubuntu 19.10 beta (amd64), *gnome-shell* 3.34.0-1ubuntu1, *Nautilus* 1:3.34.0-1ubuntu1

# Steps to reproduce

1. Star any file
2. Verify the file is listed in Starred as expected
3. Delete the original file

# Current behavior
Deleting a file that is Starred leaves behind an object `""` in Starred.

# Expected behavior
Deleting a file that is Starred removes any traces to this file from *Starred*, or removal of files which are still listed in *Starred* is prevented.

# Additional information

It does not matter whether the file is first moved to Trash, then Trash expunged, or whether the file is immediately deleted using Shift-Delete or external ways of interacting with FSO's (e.g. 'rm' on the CLI).

This issue was originally reported against [Nautilus in Ubuntu on Launchpad](https://bugs.launchpad.net/ubuntu/+source/nautilus/+bug/1845703).

Edited Oct 05, 2019 by Tom Reynolds

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