Fix screen issues with externally added items

-> Ensure that when an item is added to the db from an external
   source that the screen id exists.
-> If the screen id does not exist, add that id as the largest rank

Change-Id: I98d68900c428d80666dab1909418c6d9b0f52e10
(cherry picked from commit 484526620012f88bcd9d5656a71d4218a9acd090)