Dashboard order items count and discussion about item count.

There have been requests to adapt the reported number of order items reported in the case of Product Bundles. There are cases where bundled items should not be counted as separate items (or the opposite), and although the necessary cart filter exists, this is not the case here.

Important: 

The existing code only counts line-items and does not take into account the line item quantities. So, technically, the item count is not accurate as it is anyway. Is this intentional?