[UI] Fix for parameter form (#11875) (#11877)

- Ensure string field is properly selected

(cherry picked from commit aae97eeb40)

Co-authored-by: Oliver <oliver.henry.walters@gmail.com>

src/frontend/src/forms/CommonForms.tsx

@@ -192,6 +192,9 @@ export function useParameterFields({
             }
           } else if (record?.selectionlist) {
             setFieldType('related field');
+          } else {
+            // Default to a simple string field
+            setFieldType('string');
           }
         }
       },