Warn before software closed; fix bug on first run

Also put settings into proper dir

src/Views/MainView.axaml.cs

@@ -3,6 +3,7 @@ using Avalonia;
 using Avalonia.Controls;
 using Avalonia.Input;
 using Avalonia.Markup.Xaml;
+using MayShow.ViewModels;
 
 namespace MayShow.Views
 {
@@ -12,6 +13,7 @@ namespace MayShow.Views
         {
             this.InitializeComponent();
             LogBlock.PropertyChanged += LogBlock_PropertyChanged;
+            FilesGrid.CellEditEnded += FileCellEditEnded;
         }
 
         private void LogBlock_PropertyChanged(object? sender, AvaloniaPropertyChangedEventArgs e)
@@ -26,6 +28,18 @@ namespace MayShow.Views
         {
             var topLevel = TopLevel.GetTopLevel(this);
             topLevel?.FocusManager?.ClearFocus();
+            if (DataContext is MainViewModel mvm)
+            {
+                mvm?.HasUnsavedWork = true;
+            }
+        }
+
+        private void FileCellEditEnded(object? sender, DataGridCellEditEndedEventArgs args)
+        {
+            if (args.EditAction == DataGridEditAction.Commit && DataContext is MainViewModel mvm)
+            {
+                mvm?.HasUnsavedWork = true;
+            }
         }
     }
 }