Add proxyDomain and onNotificationProxyUrl settings to configuration

settings.json

@@ -1,6 +1,7 @@
 {
   "show_deprecation_warnings": true,
   "show_deprecation_warnings_desc": "Prints console warnings for functions that are being polyfilled by newer methods due to upstream Roblox API changes",
+  "proxyDomain": null,
 
   "session_only": true,
   "session_only_desc": "Minimizes data usage and speed up requests by only saving session cookies, disable if you need other cookies to be saved as well.",
@@ -21,7 +22,8 @@
     "onJoinRequest": 10000,
     "onShout": 10000,
     "onBlurbChange": 10000,
-    "onGroupTransaction": 60000
+    "onGroupTransaction": 60000,
+    "onNotificationProxyUrl": null
   },
 
   "thumbnail": {