Shulker boxes and chests interface

I think that a good idea would be that if you are holding a shulker box and open a chest, you'll be able to access both items at the same time making the transfer of items more easier. For example, when you open a chest normally the top of the interface shows the chest's items while the bottom shows your items. But, if you open a chest with a shulker box in hand, the top of the interface can be the chest's items while the bottom shows the shulker box's items. This makes transferring items from chests to shulker boxes more easier and vice verca.