Use formatted value in QuantityType expert

(bug 56716)
The change adjusts the QuantityType expert to make use of the formatted value resolved in valueview.
(requires change Ic79b38d9521c5b79e2685a9cecad833c2b93199d)

Change-Id: I93c440415a5f2304cfea3d89d52d838a2232af9d