Update main UI a bit

ViewModels/EditFileViewModel.cs

@@ -0,0 +1,31 @@
+#nullable enable
+
+using System;
+using System.Collections.ObjectModel;
+using System.Globalization;
+using System.IO;
+using System.Linq;
+using System.Threading.Tasks;
+using Avalonia.Platform.Storage;
+using Avalonia.Themes.Fluent;
+using DialogHostAvalonia;
+using ImageMagick;
+using MigraDoc.DocumentObjectModel;
+using MigraDoc.Rendering;
+using PdfSharp.Fonts;
+using PdfSharp.Pdf.IO;
+using PdfSharp.Snippets.Font;
+using ReceiptPDFBuilder.Interfaces;
+using ReceiptPDFBuilder.Models;
+
+namespace ReceiptPDFBuilder.ViewModels;
+
+class EditFileViewModel : BaseViewModel
+{
+    ReportFile _file;
+    
+    public EditFileViewModel(ReportFile file, IChangeViewModel viewModelChanger) : base(viewModelChanger)
+    {
+        _file = file;
+    }
+}

ViewModels/MainViewModel.cs

@@ -103,30 +103,6 @@ class MainViewModel : BaseViewModel, IFontResolver
         }
     }
 
-    public void MoveItemUp(ReportFile file)
-    {
-        var idx = ReportFiles.IndexOf(file);
-        if (idx != 0)
-        {
-            // .Move() is not observed -_-
-            // https://github.com/AvaloniaUI/Avalonia.Controls.DataGrid/issues/74
-            // ReportFiles.Move(idx, idx - 1);
-            // So, remove and insert.
-            ReportFiles.RemoveAt(idx);
-            ReportFiles.Insert(idx - 1, file);
-        }
-    }
-
-    public void MoveItemDown(ReportFile file)
-    {
-        var idx = ReportFiles.IndexOf(file);
-        if (idx != ReportFiles.Count - 1)
-        {
-            ReportFiles.RemoveAt(idx);
-            ReportFiles.Insert(idx + 1, file);
-        }
-    }
-
     public async void RemoveFile(ReportFile file)
     {
         var result = await DialogHost.Show(new WarningDeleteItemModel(file));
@@ -140,6 +116,11 @@ class MainViewModel : BaseViewModel, IFontResolver
         }
     }
 
+    public async void EditFileProperties(ReportFile file)
+    {
+        var result = await DialogHost.Show(new EditFileViewModel(file, ViewModelChanger));
+    }
+
     private async void BuildPDF()
     {
         try