always block desktop settings page if video connection exists (#10224)

1. Always block desktop settings page if video connection exists, both mouse event and key event are blocked..
2. Server control page always block key event.

Signed-off-by: 21pages <sunboeasy@gmail.com>

flutter/lib/desktop/pages/desktop_tab_page.dart

@@ -37,13 +37,9 @@ class DesktopTabPage extends StatefulWidget {
   }
 }
 
-class _DesktopTabPageState extends State<DesktopTabPage>
-    with WidgetsBindingObserver {
+class _DesktopTabPageState extends State<DesktopTabPage> {
   final tabController = DesktopTabController(tabType: DesktopTabType.main);
 
-  final RxBool _block = false.obs;
-  // bool mouseIn = false;
-
   _DesktopTabPageState() {
     RemoteCountState.init();
     Get.put<DesktopTabController>(tabController);
@@ -69,19 +65,10 @@ class _DesktopTabPageState extends State<DesktopTabPage>
     }
   }
 
-  @override
-  void didChangeAppLifecycleState(AppLifecycleState state) {
-    super.didChangeAppLifecycleState(state);
-    if (state == AppLifecycleState.resumed) {
-      shouldBeBlocked(_block, canBeBlocked);
-    } else if (state == AppLifecycleState.inactive) {}
-  }
-
   @override
   void initState() {
     super.initState();
     // HardwareKeyboard.instance.addHandler(_handleKeyEvent);
-    WidgetsBinding.instance.addObserver(this);
   }
 
   /*
@@ -97,7 +84,6 @@ class _DesktopTabPageState extends State<DesktopTabPage>
   @override
   void dispose() {
     // HardwareKeyboard.instance.removeHandler(_handleKeyEvent);
-    WidgetsBinding.instance.removeObserver(this);
     Get.delete<DesktopTabController>();
 
     super.dispose();
@@ -119,7 +105,6 @@ class _DesktopTabPageState extends State<DesktopTabPage>
                   isClose: false,
                 ),
               ),
-              blockTab: _block,
             )));
     return isMacOS || kUseCompatibleUiMode
         ? tabWidget