595-39,43,46

-Barcode scanner on Edit page now works(at least as well as AddNewItem
page's)
-Expiration date works on Edit page.
-Options page for subscribing works, now with less DB accesses.
-Barcode scan autofill on AddNewItem page works, now with less DB
accesses.
-Subscription and changed quantities edits are currently NOT being
changed in the DB.  This functionality still needs to be added.