Add date watermarks to item extended properties when the ItemType is changed.
Add date watermarks to item extended properties when the ItemType is changed.

git-tfs-id: [https://tfs.caes.ucdavis.edu:8088/tfs/DefaultCollection]$/CRP/Trunk/CRP;C6128

ucdavis/CRP,ucdavis/CRP,ucdavis/CRP