Update healthcheck policy

lib/models/app.dart

@@ -22,6 +22,7 @@ class AppState with ChangeNotifier {
   String _currentLabel;
   SystemColorSchemes _systemColorSchemes;
   List<Group> _groups;
+  num _sortNum;
 
   AppState()
       : _navigationItems = [],
@@ -32,6 +33,7 @@ class AppState with ChangeNotifier {
         _logs = [],
         _groups = [],
         _packages = [],
+        _sortNum = 0,
         _systemColorSchemes = SystemColorSchemes();
 
   String get currentLabel => _currentLabel;
@@ -159,6 +161,15 @@ class AppState with ChangeNotifier {
     }
   }
 
+  num get sortNum => _sortNum;
+
+  set sortNum(num value) {
+    if (_sortNum != value) {
+      _sortNum = value;
+      notifyListeners();
+    }
+  }
+
   List<Group> getCurrentGroups(Mode mode) {
     switch (mode) {
       case Mode.direct: