Sam Minnee 2c71daacfe MINOR: Add tests for GroupedDropdownField empty strings
These bugs were never present in SS4 as the relevant code had a
substantial rewrite at the same time they were introduced in SS3.
In SS3, test C still fails.

Fixes #4705
Fixes #4987
Fixes #4793
2019-05-27 17:46:03 +12:00
..
2018-11-13 11:09:33 +02:00
2019-04-11 11:24:17 +12:00
2019-02-19 08:41:05 +07:00