fixed source stack panel, added autoscroll to the log when adding an entry

WeModPatcher/App.xaml.cs

@@ -1,9 +1,32 @@
-namespace WeModPatcher
+using System;
+using System.Threading.Tasks;
+using System.Windows;
+using MessageBox = System.Windows.Forms.MessageBox;
+
+namespace WeModPatcher
 {
     /// <summary>
     /// Interaction logic for App.xaml
     /// </summary>
     public partial class App
     {
+        protected override void OnStartup(StartupEventArgs e)
+        {
+            AppDomain.CurrentDomain.UnhandledException += OnUnhandledException;
+            TaskScheduler.UnobservedTaskException += OnUnobservedTaskException;
+            base.OnStartup(e);
+        }
+        
+        private void OnUnobservedTaskException(object sender, UnobservedTaskExceptionEventArgs e)
+        {
+            MessageBox.Show(e.ToString());
+            Shutdown();
+        }
+
+        private void OnUnhandledException(object sender, UnhandledExceptionEventArgs e)
+        {
+            MessageBox.Show(e.ToString());
+            Shutdown();
+        }
     }
 }