Adds debugging utilities in dev/beta environments

ts/messageModifiers/MessageReceipts.ts

@@ -266,7 +266,7 @@ export class MessageReceipts extends Collection<MessageReceiptModel> {
 
           // We want the above call to not be delayed when testing with
           // CI.
-          window.Signal.CI
+          window.SignalCI
             ? deleteSentProtoBatcher.flushAndWait()
             : Promise.resolve(),
         ]);