Added pre-sorting

- Pre-sorting uses ascending natural sorting
- Previously, the files would initially be displayed in the order the operating system returned

BFR/MainWindow.xaml.cs

@@ -6,6 +6,7 @@ using System.Collections.Generic;
 using System.Text.RegularExpressions;
 
 using Avalonia;
+using Avalonia.Input;
 using Avalonia.Controls;
 using Avalonia.VisualTree;
 using Avalonia.Markup.Xaml;
@@ -13,7 +14,7 @@ using Avalonia.LogicalTree;
 
 using BFR.Helpers;
 using BFR.DataModels;
-using Avalonia.Input;
+using BFR.Operations;
 
 namespace BFR
 {
@@ -27,6 +28,7 @@ namespace BFR
         {
             WorkingDirectory = directory.Replace('\\', '/');
             AllFiles.ReplaceAll(Directory.GetFiles(WorkingDirectory).Select(x => new FileModel(x.Replace('\\', '/'))));
+            new Sort() { Mode = SortMode.Natural }.ApplyTo(AllFiles);
             Filter();
         }