Describe the bug

If you change the offset of an object, you should be able to reset it by entering a 0 (zero) from the keyboard in the relevant spin box. However the spin box will not accept keyboard input.

To Reproduce

1. Open the attached file.
   spin_box_issue.zip
2. Click on a fingering and click on the "Appearance" button (Properties panel)
3. Change the vertical offset by dragging or using the spin control
4. Now try to enter 0 (zero) in the spin box.

RESULT: The box won't accept keyboard input. Curiously, if you drag the fingering without opening the "Appearance" section, the spin box does accept keyboard input.

Expected behavior

Keyboard input to a spin box should always be accepted.

Platform information
OS: Linux Mint 20.1, Arch.: x86_64, MuseScore version (64-bit): 4.0.0-3117031689, revision: github-musescore-musescore-bd3e1bb