增加布局存储和还原

SpineViewer/Models/MainWindowLayoutModel.cs

@@ -0,0 +1,23 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Windows;
+
+namespace SpineViewer.Models
+{
+    public class MainWindowLayoutModel
+    {
+        public double WindowLeft { get; set; }
+        public double WindowTop { get; set; }
+        public double WindowWidth { get; set; }
+        public double WindowHeight { get; set; }
+        public WindowState WindowState { get; set; }
+        
+        public double RootGridCol0Width { get; set; }
+        public double ModelListRow0Height { get; set; }
+        public double ExplorerGridRow0Height { get; set; }
+        public double RightPanelGridRow0Height { get; set; }
+    }
+}