'other' option with text field.

[Cloneill-2021]

When 'other' choice is selected have an associated text field in in the Survey123 version. 'Other' option shows in the following survey fields:

• Survey method
• Arthropod group
• Developmental stage
• Activity
• host taxonomic group
• phenology

[mgietzmann]

Fixed with https://github.com/earthwiseaware/field_surveys/commit/b7db95fe87337df8d2e56338107081191e387869