fix(VAppBar): use actual DOM params

[OlTrenin]

Description

fixes #21754

Markup:

const { layoutItemStyles } = useLayoutItem({
      id: props.name,
      order: computed(() => parseInt(props.order, 10)),
      position: toRef(() => props.location),
      layoutSize: height,
      elementSize: height, // This tells layout system to use actual DOM measurements
      active: isActive,
      absolute: toRef(() => props.absolute),
    })