maxMappableSelectFields setting

By default, the Dromo importer will only show the select option matching step for a field if the field has 50 or fewer unique values. This is because with more unique values, the option mapping UI can get unwieldy, and often simply means the column was mismapped.

In the event that many unique values are expected, you can override the maximum number of unique values that the Dromo importer will show using the new matchValuesStep.maxMappableSelectValues setting.