[bvl_feedback] Update summary in real time (#8966)

This fixes the bvl_feedback module to update the summary in real time after opening or closing feedbacks. The PR also fixes a Unexpected end to json input react error when opening and closing feedbacks by changing the success response to a json response.

Resolves #4984

CHANGELOG.md

@@ -13,6 +13,9 @@ changes in the following format: PR #1234***
 #### Features
 - Add OpenID Connect authorization support to LORIS (PR #8255)
 
+#### Bug Fixes
+- bvl_feedback updates in real-time (PR #8966)
+
 ## LORIS 25.0 (Release Date: ????-??-??)
 ### Core
 #### Features

modules/bvl_feedback/ajax/open_bvl_feedback_thread.php

@@ -38,6 +38,9 @@
     exit;
 }
 
-header("HTTP/1.1 204 No Content");
+header("Content-Type: application/json");
+print json_encode(
+    ['status' => 'success']
+);
 exit;
 

modules/bvl_feedback/jsx/react.behavioural_feedback_panel.js

@@ -900,11 +900,9 @@ class FeedbackPanel extends Component {
         console.error(response.status + ': ' + response.statusText);
         return;
       }
-
-      response.json().then(() => {
-        this.setState({threads: threads});
-        this.loadSummaryServerData();
-      });
+      this.setState({threads: threads});
+      this.loadSummaryServerData();
+      this.loadThreadServerState();
     }).catch((error) => {
       console.error(error);
     });
@@ -936,11 +934,9 @@ class FeedbackPanel extends Component {
         console.error(response.status + ': ' + response.statusText);
         return;
       }
-
-      response.json().then(() => {
-        this.setState({threads: threads});
-        this.loadSummaryServerData();
-      });
+      this.setState({threads: threads});
+      this.loadSummaryServerData();
+      this.loadThreadServerState();
     }).catch((error) => {
       console.error(error);
     });