fix: the MinWidth of author column changed after dragging the right border of it (#1591)

Signed-off-by: leo <longshuang@msn.cn>

Author: love-linger

src/ViewModels/LayoutInfo.cs

@@ -68,14 +68,14 @@ public GridLength CommitDetailFilesLeftWidth
         public DataGridLength AuthorColumnWidth
         {
             get => _authorColumnWidth;
-            set => SetProperty(ref _authorColumnWidth, value);
+            set => SetProperty(ref _authorColumnWidth, new DataGridLength(value.Value, DataGridLengthUnitType.Pixel, 0, value.DisplayValue));
         }
 
         private GridLength _repositorySidebarWidth = new GridLength(250, GridUnitType.Pixel);
         private GridLength _workingCopyLeftWidth = new GridLength(300, GridUnitType.Pixel);
         private GridLength _stashesLeftWidth = new GridLength(300, GridUnitType.Pixel);
         private GridLength _commitDetailChangesLeftWidth = new GridLength(256, GridUnitType.Pixel);
         private GridLength _commitDetailFilesLeftWidth = new GridLength(256, GridUnitType.Pixel);
-        private DataGridLength _authorColumnWidth = new DataGridLength(120, DataGridLengthUnitType.Pixel, 120, 120);
+        private DataGridLength _authorColumnWidth = new DataGridLength(120, DataGridLengthUnitType.Pixel, 0, 120);
     }
 }