UI: only mobile clear actived

lib/apps/chat/detail.dart

@@ -55,7 +55,9 @@ class _ChatDetailState extends State<ChatDetail> {
 
   @override
   void deactivate() {
+    if (!isDisplayDesktop(context)) {
       context.read<AccountProvider>().clearActivedSession(SessionType.Chat);
+    }
     super.deactivate();
   }
 

lib/apps/group_chat/detail.dart

@@ -60,7 +60,9 @@ class _GroupChatDetailState extends State<GroupChatDetail> {
 
   @override
   void deactivate() {
+    if (!isDisplayDesktop(context)) {
       context.read<AccountProvider>().clearActivedSession(SessionType.Group);
+    }
     super.deactivate();
   }