Clicking delete on a web application doesn't remove it from the list until restarting the app

[Ads20000]

To reproduce:
- Open GNOME Web
- Go to a website
- Click the hamburger menu, then 'Install Site as Web Application...', then Create
- Open Main Menu (alacarte)
- Go to Internet
- Click on the web application you just made, then click Delete

Expected results:
The menu item is visibly removed from the Main Menu application and from the GNOME Applications view

Actual results:
The menu item is removed from the GNOME Applications view, but not from the Main Menu application until you close the application and then open it again

ProblemType: Bug
DistroRelease: Ubuntu 17.10
Package: alacarte 3.11.91-2
ProcVersionSignature: Ubuntu 4.13.0-19.22-generic 4.13.13
Uname: Linux 4.13.0-19-generic x86_64
NonfreeKernelModules: zfs zunicode zavl zcommon znvpair
ApportVersion: 2.20.7-0ubuntu3.6
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
Date: Mon Dec 11 17:18:02 2017
InstallationDate: Installed on 2017-08-03 (129 days ago)
InstallationMedia: Ubuntu 17.04 "Zesty Zapus" - Release amd64 (20170412)
PackageArchitecture: all
SourcePackage: alacarte
UpgradeStatus: Upgraded to artful on 2017-10-21 (50 days ago)