perf: 优化支持记录密码 (#6247)

* perf: 优化 xrdp setting

* perf: 优化支持记录密码

Co-authored-by: ibuler <ibuler@qq.com>

apps/settings/serializers/settings.py

@@ -137,6 +137,7 @@ class TerminalSettingSerializer(serializers.Serializer):
     TERMINAL_RDP_ADDR = serializers.CharField(
         required=False, label=_("RDP address"),
         max_length=1024,
+        allow_blank=True,
         help_text=_('RDP visit address, eg: dev.jumpserver.org:3389')
     )