Avoid null references on game edit/add page

LANCommander/Components/ActionEditor.razor

@@ -60,6 +60,9 @@
 
     protected override async Task OnInitializedAsync()
     {
+        if (Game.Actions == null)
+            Game.Actions = new List<Data.Models.Action>();
+
         OrderedActions = Game.Actions.OrderBy(a => a.SortOrder).ToList();
         FixSortOrder();
     }

LANCommander/Components/ArchiveUploader.razor

@@ -99,6 +99,9 @@
 
     protected override async Task OnInitializedAsync()
     {
+        if (Game.Archives == null)
+            Game.Archives = new List<Archive>();
+
         HttpClient.BaseAddress = new Uri(Navigator.BaseUri);
 
         Archive = new Archive()

LANCommander/Components/KeysEditor.razor

@@ -78,6 +78,9 @@
 
     protected override async Task OnInitializedAsync()
     {
+        if (Game.Keys == null)
+            Game.Keys = new List<Key>();
+
         AllocatedKeys = Game.Keys.Count(k => k.IsAllocated());
     }
 

LANCommander/Components/MultiplayerModeEditor.razor

@@ -38,6 +38,12 @@
 @code {
     [Parameter] public Game Game { get; set; }
 
+    protected override async Task OnInitializedAsync()
+    {
+        if (Game.MultiplayerModes == null)
+            Game.MultiplayerModes = new List<MultiplayerMode>();
+    }
+
     private void AddMode()
     {
         if (Game.MultiplayerModes == null)

LANCommander/Components/ScriptEditor.razor

@@ -110,6 +110,9 @@
 
     protected override async Task OnInitializedAsync()
     {
+        if (Game.Scripts == null)
+            Game.Scripts = new List<Script>();
+
         Snippets = ScriptService.GetSnippets();
 
         if (Script == null)