when clicking Details of packages to be changed as part of dist upgrade, window resizes beyond viewable screen size

[rupert]

The upgrade window fits within the visible screen size as expected.

However, when you get to the "Do you want to start the upgrade?" screen and click Details at the bottom, the window resizes to fit the additional details, but this causes the buttons to be hidden beneath the bottom of the screen and there is no way to resize the window to allow you to click the buttons, as shown in ss2.png. This effectively getting you permanently stuck as there is no way to exit the window (other than tabbing through the buttons and hoping to hit Enter on the correct one, which some users may not know about).

Clicking Details again to hide the additional information doesn't resize the window, so is not a fix. If the window resized to fit the screen again, this would fix the issue.

ProblemType: Bug
DistroRelease: Ubuntu 21.04
Package: ubuntu-release-upgrader-core 1:21.04.17
ProcVersionSignature: Ubuntu 5.11.0-38.42-lowlatency 5.11.22
Uname: Linux 5.11.0-38-lowlatency x86_64
NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
ApportVersion: 2.20.11-0ubuntu65.4
Architecture: amd64
CasperMD5CheckResult: unknown
CrashDB: ubuntu
CurrentDesktop: MATE
Date: Fri Oct 29 09:34:19 2021
PackageArchitecture: all
SourcePackage: ubuntu-release-upgrader
Symptom: ubuntu-release-upgrader
UpgradeStatus: Upgraded to hirsute on 2021-10-29 (0 days ago)
VarLogDistupgradeTermlog:

[rupert (r-plumridge)]

Additional screenshot to show how the window is initially correctly sized.

[rupert (r-plumridge)]

And when closing the Details section, the window remains the same size and still is too large for the screen.

[rupert (r-plumridge)]

Resolution of device (Clevo W110er laptop) is the default as set by Ubuntu - 1366 x 768 - the screen size is 11.6".