Shortcuts for Up/Down still work while rebasing

What steps will reproduce the problem?

1. Start a rebase with several commits
2. Select a commit and press u / d

What is the expected output? What do you see instead?

The commit is moved up and down in the list. Because the Up / Down buttons are disabled during the rebase, their shortcuts should also be disabled.

What version of TortoiseGit and Git are you using? On what operating system?

TortoiseGit: 2.6.0.0 git: 2.18.0.windows.1

Sebastian