Layout Grid: Support setting the gutter to spacingSizes/spacingScale values #343
Description
Currently, the Gutter setting in the Layout Grid block allows you to set the following values:
- No gutter
- Small: 8px
- Medium: 16px
- Large: 24px
- Huge: 48px
If the active theme has a theme.json file with spacingSizes or a spacingScale set, those values should also be included in the list of gutter values.