Missing close button on "Ubuntu Desktop" tab of gnome settings manager

[Bryan Everly]

If you click first on "Appearance", you will see a close button on the upper right-hand corner of the application. If you now click on "Ubuntu Desktop", that close button is missing. This is only on the daily build of Mantic.

ProblemType: Bug
DistroRelease: Ubuntu 23.10
Package: gnome-system-monitor 45.0-1
ProcVersionSignature: Ubuntu 6.3.0-7.7-generic 6.3.5
Uname: Linux 6.3.0-7-generic x86_64
NonfreeKernelModules: zfs
ApportVersion: 2.27.0-0ubuntu2
Architecture: amd64
CasperMD5CheckResult: pass
CurrentDesktop: ubuntu:GNOME
Date: Tue Sep 12 11:44:53 2023
ExecutablePath: /usr/bin/gnome-system-monitor
InstallationDate: Installed on 2023-01-31 (224 days ago)
InstallationMedia: Ubuntu 22.10 "Kinetic Kudu" - Release amd64 (20221020)
ProcEnviron:
 LANG=en_US.UTF-8
 PATH=(custom, user)
 SHELL=/bin/bash
 XDG_RUNTIME_DIR=<set>
SourcePackage: gnome-system-monitor
UpgradeStatus: Upgraded to mantic on 2023-09-10 (2 days ago)