Merge "Drag and drop a new widget should place it before CTA tile" into main

    private var isOnRemoveButton = false

    fun onStarted() {

        // assume item will be added to the end.

        contentListState.list.add(placeHolder)

        // assume item will be added to the second to last position before CTA tile.

        placeHolderIndex = contentListState.list.size - 1

        placeHolderIndex?.let { contentListState.list.add(it, placeHolder) }

    }

    fun onMoved(event: DragAndDropEvent) {