check if user has disallowed feedback api

www/common/cryptpad-common.js

@@ -24,16 +24,9 @@ define([
         Alertify: Alertify,
     };
 
-    common.feedback = function (action) {
-        if (!action) { return; }
-        $.ajax({
-            type: "HEAD",
-            url: '/common/feedback.html?' + action + '=' + (+new Date()),
-        });
-    };
-
     var store;
 
+
     var find = common.find = function (map, path) {
         return (map && path.reduce(function (p, n) {
             return typeof(p[n]) !== 'undefined' && p[n];
@@ -61,6 +54,17 @@ define([
         return;
     };
 
+    common.feedback = function (action) {
+        if (!action) { return; }
+        try {
+            if (!getStore().getProxy().proxy.allowUserFeedback) { return; }
+        } catch (e) { return void console.error(e); }
+        $.ajax({
+            type: "HEAD",
+            url: '/common/feedback.html?' + action + '=' + (+new Date()),
+        });
+    };
+
     var whenRealtimeSyncs = common.whenRealtimeSyncs = function (realtime, cb) {
         realtime.sync();
         realtime.onSettle(cb);