Icons are really small on high DPI screen

[PJSingh5000]

The icons are really tiny on a high dpi screen.

3840x2160 resolution

$ gnome-shell --version
GNOME Shell 3.26.1

ProblemType: Bug
DistroRelease: Ubuntu 17.10
Package: bzr-explorer 1.3.0-2
ProcVersionSignature: Ubuntu 4.13.0-16.19-generic 4.13.4
Uname: Linux 4.13.0-16-generic x86_64
ApportVersion: 2.20.7-0ubuntu3.1
Architecture: amd64
CurrentDesktop: GNOME
Date: Sun Nov 5 13:01:54 2017
InstallationDate: Installed on 2017-11-03 (1 days ago)
InstallationMedia: Ubuntu 17.10.0 2017.10.23 amd64 "Custom Artful Aardvark"
PackageArchitecture: all
ProcEnviron:
 TERM=xterm-256color
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: bzr-explorer
UpgradeStatus: No upgrade log present (probably fresh install)