Adds "Error Message" field to Fields screen

- Adds the Error Message field to the Fields screens, to allow viewing and
  editing that property on each field.

- Moves "description" of a field to the top field to edit.

- Addes "description" field to the fields "view" screen.
Make "Fields" verbiage consistent in UI

- `s/Input/Field/`
- `s/Input Filter/Fields/`
Rebuilt UI distribution
Merge branch 'feature/input-error-message'

Close #135