Unable to scroll interface tabs with mouse wheel on MSM

[N0rbert]

Expected behaviour

On Ubuntu MATE 16.04 LTS user was able to use mouse wheel to scroll interface tabs.

Actual behaviour

On development version of Ubuntu 19.10 this is not possible - tabs do not react on mouse wheel.

Steps to reproduce the behaviour

1. Install Ubuntu MATE 19.10
2. Open mate-session-properties
3. Try to switch interface tabs with mouse wheel

MATE general version

1.22.1

Package version

1.22.1-0ubuntu2

Linux Distribution

Ubuntu 19.10

Link to downstream report of your Distribution

https://bugs.launchpad.net/ubuntu/+source/mate-session-manager/+bug/1828803

[raveit65]

Was this behavior intended?

[N0rbert]

As long time GNOME2 user this functionality is intended / expected / useful for me. Seems to be GTK3-caused regression.