Multiple Changes:

DXA8 now directly asks for password, as guessing it, is made improbable.
Promote several private methods to `protected` status
Add code for indexing DXA8 files. (not finished)

ArcFormats/DxLib/WidgetDXA.xaml.cs

@@ -0,0 +1,29 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Windows;
+using System.Windows.Controls;
+using System.Windows.Data;
+using System.Windows.Documents;
+using System.Windows.Input;
+using System.Windows.Media;
+using System.Windows.Media.Imaging;
+using System.Windows.Navigation;
+using System.Windows.Shapes;
+using GameRes.Formats.DxLib;
+
+namespace GameRes.Formats.GUI
+{
+    /// <summary>
+    /// Logika interakcji dla klasy WidgetDXA.xaml
+    /// </summary>
+    public partial class WidgetDXA : StackPanel
+    {
+        public WidgetDXA()
+        {
+            InitializeComponent();
+        }
+    }
+}