Bug description

The User can't change the pitch of a given clip via the shortcut 'ALT+Up/Down Arrow' on the keyboard.

Steps to reproduce

1. Launch Audacity
2. Generate a Clip into a new Track
3. Select the Clip
4. Press 'Alt+Up/Down Arrow'
5. Observe result

Expected behavior

The pitch should change according to which arrow key has been pressed.

Actual behavior

The pitch does not change via the shortcut.

Audacity Version

Audacity 4 alpha

Operating system

Windows, macOS, Linux

Additional context

No response