use patch for updates of workflow states

app/components/BookBuilder/Chapter/ProgressItem.jsx

@@ -48,8 +48,13 @@ export class ProgressItem extends React.Component {
     position += 1                      // move up a level
     if (position >= len) position = 0  // or cycle back to the beginning
 
-    chapter.progress[type] = position
-    update(chapter)
+    const patch = {
+      id: chapter.id,
+      progress: chapter.progress
+    }
+
+    patch.progress[type] = position
+    update(patch)
 
     this.setState({ showModal: false })
   }