When using the GUI document validation rule builder, it would be a lot simpler to use if it allowed you to select from the existing document field names rather than having to type them in.

Acceptance Criteria:

• Use the react-select component index field names (COMPASS-540) to wire it up to the field store (COMPASS-727)
• Add functional tests for adding field names to Document Validation
• Update existing enzyme tests to account for these changes