In TabStaff, \grace with \override misbehaves when it’s the first note

[Nate Whetsell]

Hi there,

Thanks for all your work on LilyPond!

In a TabStaff, if a grace note is the first note and the \grace contains 
overrides, the overrides seem to be applied to whatever follows the grace note 
(instead of the grace note itself). Here’s an example that illustrates the 
behavior:

```
\version "2.22.1"

% Font size is unexpectedly increased for what follows the grace note.
\score {
  \new TabStaff {
      \grace { \override TabNoteHead.font-size = #3 c' \revert 
TabNoteHead.font-size } d'
  }
}

% But when something precedes the grace note, font size increases as expected.
\score {
  \new TabStaff {
    r \grace { \override TabNoteHead.font-size = #3 c' \revert 
TabNoteHead.font-size } d'
  }
}
```

(I also tried this using the latest version from the Git repo, and the behavior 
is the same.)

All the best,
Nate