Revert "[FIX] DropdownBox: Error on blur when selected item doesn't exist"

This reverts commit 9c5d48190592ac04b6579ac4bf868cb114484eea.

Change-Id: I9761de2cb587bdde396a4d870b120c2a4bbd7d5c
Merge "Revert "[FIX] DropdownBox: Error on blur when selected item doesn't exist""