Impossible to enter translation manually

[mdoering]

For fields with many unique values, e.g. identifiers, it is impossible to add a translation manually as one has to select from the list of provided values. Which seems to be limited to the first x values.

Allow any mapping to be added manually.

[mdoering]

https://ipt.gbif-uat.org/manage/dataPackageFieldTranslationReload.do?r=clements&field=ordinal&mid=0