GUI: Add load options dialog with ELF image base option

Il2CppInspector.GUI/LoadOptionsDialog.xaml.cs

@@ -0,0 +1,39 @@
+// Copyright (c) 2020 Katy Coe - https://www.djkaty.com - https://github.com/djkaty
+// All rights reserved
+
+using System;
+using System.Collections.Generic;
+using System.Text;
+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.Shapes;
+using Il2CppInspectorGUI;
+
+namespace Il2CppInspector.GUI
+{
+    /// <summary>
+    /// Interaction logic for LoadOptionsDialog.xaml
+    /// </summary>
+    public partial class LoadOptionsDialog : Window
+    {
+        public LoadOptionsDialog() {
+            InitializeComponent();
+
+            var app = (App) Application.Current;
+            if (app.LoadOptions == null)
+                app.ResetLoadOptions();
+
+            DataContext = app.LoadOptions;
+        }
+
+        private void okButton_Click(object sender, RoutedEventArgs e) {
+            // Closes dialog box automatically
+            DialogResult = true;
+        }
+    }
+}