Fix issue with Picker API migration - multi mode support is broken in the new API

Author: ethanshar

src/components/picker/PickerItem.js

@@ -139,9 +139,9 @@ class PickerItem extends BaseComponent {
 
   // TODO: deprecate the check for object
   onPress = () => {
-    const {value, onPress} = this.props;
-    // onPress(_.isObject(value) ? value : {value, label});
-    onPress(value);
+    const {value, label, onPress} = this.props;
+    onPress(_.isObject(value) ? value : {value, label});
+    // onPress(value);
   };
 }