Picking Flow - Change window picking on existing SSCC

Two windows needs to be merged together. 

http://wiki.produmex.name/doku.php?id=implementation:wms:picking

We currently have two different flow screens on the same step. If you have already picked a partial pallet, or a full pallet of something:

The System is asking you to pick on an existing SSCC, but in this window you don't have any option to pick on an identified SSCC. --> "19.1.4.1. No moveable location defined for the warehouse" 

after going one step back and in again, you get the window.

"19.1.4.3.1. Select an existing logistic unit"
which is exactly the one needed at this moment. By Entering SSCC you should also be able to scan the preexisting SSCCs listed in 19.1.4.1 and empty SSCCs which are assigned to the system.