Upgrade to new form binder

mobile/src/Activity/Activity.js

@@ -191,7 +191,7 @@ export class Activity extends React.Component {
   @autobind
   handleDonePress() {
     const { binder } = this.state
-    let obj = binder.getModifiedFieldValues()
+    let obj = binder.getmodifiedBindingValues()
 
     if (!obj._id) {
       api