Unable to scroll tabs by mouse wheel in Profile Preferences of MATE Terminal

[Norbert]

#### Expected behaviour
In previous MATE 1.12.1 version (as it was in Ubuntu 16.04 LTS) user was able to scroll tabs of Profile Preferences with mouse wheel.

#### Actual behaviour
In modern MATE versions as in Ubuntu 19.10 (development version) user is unable to scroll tabs of Profile Preferences with mouse wheel.

#### Steps to reproduce the behaviour
1. Open MATE Terminal
2. Go to Edit → Profile Preferences
3. Try to scroll shown tabs with mouse wheel

#### MATE general version
1.22.1

#### Package version
1.22.1-0ubuntu1

#### Linux Distribution
Ubuntu 19.10 (development version)

ProblemType: Bug
DistroRelease: Ubuntu 19.10
Package: mate-terminal 1.22.1-0ubuntu1
ProcVersionSignature: Ubuntu 5.2.0-8.9-generic 5.2.0
Uname: Linux 5.2.0-8-generic x86_64
ApportVersion: 2.20.11-0ubuntu5
Architecture: amd64
CurrentDesktop: MATE
Date: Fri Aug 2 21:43:10 2019
InstallationDate: Installed on 2019-07-03 (29 days ago)
InstallationMedia: Ubuntu-MATE 19.10 "Eoan Ermine" - Alpha amd64 (20190703)
SourcePackage: mate-terminal
UpgradeStatus: No upgrade log present (probably fresh install)

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Norbert (nrbrtx)]

Works as expected in 21.10.