Method invalidateItem

src/utils/VirtualScroller.ts:848–850

* Invalidate a specific item by key, forcing it to re-render

(key: string)

	 * Invalidate a specific item by key, forcing it to re-render
	 */
	invalidateItem(key: string): void {
		this.invalidateItems([key], { invalidateHeights: true });
	}

	/**
	 * Invalidate height measurements for specific indices