fix: repository settings did not saved correctly when closing app (#459)

src/ViewModels/Launcher.cs

@@ -107,6 +107,21 @@ namespace SourceGit.ViewModels
             _ignoreIndexChange = false;
         }
 
+        public void Quit(double width, double height)
+        {
+            var pref = Preference.Instance;
+            pref.Layout.LauncherWidth = width;
+            pref.Layout.LauncherHeight = height;
+            pref.Save();
+
+            _ignoreIndexChange = true;
+
+            foreach (var one in Pages)
+                CloseRepositoryInTab(one, false);
+
+            _ignoreIndexChange = false;
+        }
+
         public void AddNewTab()
         {
             var page = new LauncherPage();

src/Views/Launcher.axaml.cs

@@ -221,11 +221,7 @@ namespace SourceGit.Views
 
         protected override void OnClosing(WindowClosingEventArgs e)
         {
-            var pref = ViewModels.Preference.Instance;
-            pref.Layout.LauncherWidth = Width;
-            pref.Layout.LauncherHeight = Height;
-            pref.Save();
-
+            (DataContext as ViewModels.Launcher)?.Quit(Width, Height);
             base.OnClosing(e);
         }