Fix new cm tab not replace the old persisted tab (#9127)

* This happens when after changing DesktopTab to StatefulWidget, 1.2.7
  and 1.3.0 have this problem.
* When `addConnection` in server_model.dart is called, the old closed
  client is removed, the client parameter of buildConnectionCard is new,
but client id inside Consumer is old.
* The only state in cm page is timer, its value is kept in test.
* There may be a better way to solve the ui update.

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

flutter/lib/desktop/widgets/tabbar_widget.dart

@@ -552,6 +552,13 @@ class _DesktopTabState extends State<DesktopTab>
             controller: state.value.pageController,
             physics: NeverScrollableScrollPhysics(),
             children: () {
+              if (DesktopTabType.cm == tabType) {
+                // Fix when adding a new tab still showing closed tabs with the same peer id, which would happen after the DesktopTab was stateful.
+                return state.value.tabs.map((tab) {
+                  return tab.page;
+                }).toList();
+              }
+
               /// to-do refactor, separate connection state and UI state for remote session.
               /// [workaround] PageView children need an immutable list, after it has been passed into PageView
               final tabLen = state.value.tabs.length;