menulibre crashed with AttributeError in remove_selected(): 'TreeModelFilter' object has no attribute 'remove'

[Spass]

I'm using/testing Xubuntu 17.10 Artful Aardvark (development branch), menulibre 2.1.3-0ubuntu1

Bug appeared after deleting a test Launcher and closing menulibre.

ProblemType: Crash
DistroRelease: Ubuntu 17.10
Package: menulibre 2.1.3-0ubuntu1
ProcVersionSignature: Ubuntu 4.10.0-20.22-generic 4.10.8
Uname: Linux 4.10.0-20-generic x86_64
ApportVersion: 2.20.4-0ubuntu6
Architecture: amd64
CurrentDesktop: XFCE
Date: Wed May 10 16:54:55 2017
ExecutablePath: /usr/bin/menulibre
InstallationDate: Installed on 2017-05-09 (0 days ago)
InstallationMedia: Xubuntu 17.10 "Artful Aardvark" - Alpha amd64 (20170509)
InterpreterPath: /usr/bin/python3.5
PackageArchitecture: all
ProcCmdline: /usr/bin/python3 /usr/bin/menulibre
PythonArgs: ['/usr/bin/menulibre']
SourcePackage: menulibre
Title: menulibre crashed with AttributeError in remove_selected(): 'TreeModelFilter' object has no attribute 'remove'
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo

[Spass (malysps-deactivatedaccount)]

To be slightly more specific, step by step:
- the launcher was named 'new launcher'
- I've search for 'new' in the top search field in menulibre
- launcher appeared on the list and I've selected it
- I clicked 'Delete' button
- launcher was still visible on the list, so I clicked 'Delete' button once again
- warning appeared that launcher cannot be deleted
- I closed menulibre window and relaunch it
- I searched for 'new', launcher did not appear on the list (it was deleted)
- I closed menulibre, seconds later the bug report window appeared

[Ubuntu QA Website (ubuntuqa)]

This bug has been reported on the Ubuntu Package testing tracker.

A list of all reports related to this bug can be found here:
http://packages.qa.ubuntu.com/qatracker/reports/bugs/1689842