Experiment with proposed fix to useForcedLayout

[senadir]

In pca54o-4GY-p2#comment-4658 Jarda proposed a refactor to useForcedLayout that would eliminate the need for complex state management and would just batch things using pure JS.

This is a simplified version of that code, keep note that useForcedLayout should still take into account existing templates and block placement.

function useForcedLayout( clientId ) {
  const registry = useRegistry();
  useEffect( () => {
    const unsub = registry.subscribe( () => {
      const innerBlocks = registry.select( 'core/block-editor' ).getBlocks( clientId );
      const missingBlocks = getMissingBlocks( innerBlocks );
      for ( const block of missingBlocks ) {
        registry.dispatch( 'core/block-editor' ).appendBlock( block );
      }
    } );
    return () => unsub();
  }, [ clientId, registry ] );
}

[alexflorisca]

This was addressed in #7879