Cannot Adjust for TV and Scale at same time (simultaneously)

[Gold Star]

## Version tested:
Ubuntu 20.04 Beta

## Reproduction steps:

Boot Ubuntu 20.04 Beta ISO
Launch Settings window
Open the Display settings

Click the button to set scale to 200%
Push green apply button at top right of window
(screen resize)
Push Keep Changes button

Click the button to set scale to 100% AND click the Adjust for TV slider
Push green apply button at top right of window
Push Keep Changes button
>>> Adjust for TV is complete but scale is NOT 100% <<<
>>> Adjust for TV slider is turned off still <<<

Click the button to set scale to 100%
Push green apply button at top right of window
>>> Adjust for TV is turned off now (properly reflecting the slider value) <<<

Click the button to set scale to 100%
Push green apply button at top right of window
Screen is finally adjust back to 100%

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: gnome-control-center 1:3.36.1-1ubuntu2
ProcVersionSignature: Ubuntu 5.4.0-21.25-generic 5.4.27
Uname: Linux 5.4.0-21-generic x86_64
NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
ApportVersion: 2.20.11-0ubuntu22
Architecture: amd64
CasperVersion: 1.442
CurrentDesktop: ubuntu:GNOME
Date: Wed Apr 8 02:15:56 2020
ExecutablePath: /usr/bin/gnome-control-center
LiveMediaBuild: Ubuntu 20.04 LTS "Focal Fossa" - Beta amd64 (20200402)
ProcEnviron:
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=C.UTF-8
 SHELL=/bin/bash
SourcePackage: gnome-control-center
UpgradeStatus: No upgrade log present (probably fresh install)

[Gold Star (goldstar611)]

A very similar thing happens if you keep changing the Adjust for TV slider after each time you click the green "Apply" button so that code path should be tested as well.

[Sebastien Bacher (seb128)]

Thank you for your bug report. Could you add a screenshot to the bug showing the control UI?
What monitors config do you use?
Could you also add your 'journalctl -b 0' log to the bug?

[Gold Star (goldstar611)]

Attached is the output of `journalctl -b 0` as requested.

I had a terminal open and ran `logger [LP1871519] ...` as I interacted with the settings dialog to help you track down what is going wrong. I will answer your other questions in another comment as I cant see them when attaching files

[Gold Star (goldstar611)]

> Could you add a screenshot to the bug showing the control UI?

image is attached.

> What monitors config do you use?

I have one monitor, a Viewsonic 23" VS14880 (https://www.viewsonic.com/us/vx2370smh-led.html)