ComboBox:Clearable

Build 2426 on fix-number-input-and-fields
Reviewing disabled
Baseline History
Build 24265ca341e
Current build. There are unaccepted changes, so build 2368 is still the baseline.
Build 2368c239d29 current baseline
Accepted by Andrey Yamanov.
Build 2295ac2074d
Accepted by Andrey Yamanov.
Build 2291dbef0b0
Accepted by Andrey Yamanov.
Build 2180d0ed1cb
Accepted by Andrey Yamanov.
Commenting is disabled because there's a newer build on this branch