remove overlay of PortForward page because it will cause rebuilding when closing

msgbox

Signed-off-by: 21pages <pages21@163.com>

flutter/lib/desktop/pages/port_forward_page.dart

@@ -70,9 +70,6 @@ class _PortForwardPageState extends State<PortForwardPage>
   @override
   Widget build(BuildContext context) {
     super.build(context);
-    return Overlay(initialEntries: [
-      OverlayEntry(builder: (context) {
-        _ffi.dialogManager.setOverlayState(Overlay.of(context));
     return Scaffold(
       backgroundColor: MyTheme.color(context).grayBg,
       body: FutureBuilder(future: () async {
@@ -93,11 +90,9 @@ class _PortForwardPageState extends State<PortForwardPage>
                   child: Container(
                     decoration: BoxDecoration(
                         color: MyTheme.color(context).bg,
-                            border:
-                                Border.all(width: 1, color: MyTheme.border)),
-                        child: widget.isRDP
-                            ? buildRdp(context)
-                            : buildTunnel(context),
+                        border: Border.all(width: 1, color: MyTheme.border)),
+                    child:
+                        widget.isRDP ? buildRdp(context) : buildTunnel(context),
                   ),
                 ),
               ],
@@ -107,8 +102,6 @@ class _PortForwardPageState extends State<PortForwardPage>
         return const Offstage();
       }),
     );
-      })
-    ]);
   }
 
   buildPrompt(BuildContext context) {