[Update] Merge master_bugfix to dev_bugfix (#2817)

* [Update] 邮件设置添加配置项：发送账号 (#2795)

* [Bugfix] 修复普通用户被授权的RemoteApp列表加载为空的bug

* [Bugfix] 修复普通用户加载被授权的RemoteApp为空的bug

* [Update] 修改邮件测试的接受者为发送者

apps/settings/api.py

@@ -39,7 +39,7 @@ class MailTestingAPI(APIView):
                 subject = "Test"
                 message = "Test smtp setting"
                 email_from = email_from or email_host_user
-                send_mail(subject, message,  email_from, [email_host_user])
+                send_mail(subject, message,  email_from, [email_from])
             except Exception as e:
                 return Response({"error": str(e)}, status=401)