feat(richtext-lexical): allow customizing maxActiveItems for toolbar groups

[AlessioGr]

Previously, they were hardcoded to 1. This is useful for lexical toolbar groups where multiple items can be active at the same time.

Example

Within your own lexical feature, you decide to add text format options to a dropdown toolbar. Since text can be both bold and italic, you want to allow multiple toolbar items to have an active state.

To do that, simply add the maxActiveItems property to the toolbar group:

toolbarFixed: {
  groups: [
    {
      type: 'dropdown',
      ChildComponent: MyIcon,
      items: groupItems,
      key: ‘formats',
      order: 20,
      maxActiveItems: 10, // <==
    }
  ]
}

[github-actions]

🚀 This is included in version v3.1.0