Dropdown:Using query with null value

Build 707 on feat/dropdown-overhaul
1200px
Reviewing disabled
Baseline History
Build 7071dc65d0
Current build. There are unaccepted changes, so build 320 is still the baseline.
Build 3200881847 current baseline
Accepted by Zach Stence.
Commenting is disabled because there's a newer build on this branch