Refactor global anon blocks to use request.js

app/javascript/retrospring/features/moderation/blockAnon.ts

@@ -1,4 +1,4 @@
-import Rails from '@rails/ujs';
+import { post } from '@rails/request.js';
 import swal from 'sweetalert';
 
 import { showErrorNotification, showNotification } from "utilities/notifications";
@@ -28,19 +28,20 @@ export function blockAnonEventHandler(event: Event): void {
       global: 'true'
     };
 
-        Rails.ajax({
-            url: '/ajax/block_anon',
-            type: 'POST',
-            data: new URLSearchParams(data).toString(),
-            success: (data) => {
+    post('/ajax/block_anon', {
+      body: data,
+      contentType: 'application/json'
+    })
+      .then(async response => {
+        const data = await response.json;
+
         if (!data.success) return false;
 
         showNotification(data.message);
-            },
-            error: (data, status, xhr) => {
-                console.log(data, status, xhr);
+      })
+      .catch(err => {
+        console.log(err);
         showErrorNotification(I18n.translate('frontend.error.message'));
-            }
       });
   });
 }