BaseDataWindow: fix SeasonList Enabling/Disabling

Elwig/Windows/BaseDataWindow.xaml.WineAttr.cs

@@ -19,7 +19,6 @@ namespace Elwig.Windows {
         private bool _attrUpdate = false;
 
         private void WineAttributesInitEditing() {
-            SeasonList.IsEnabled = false;
             _attrList = new(Context.WineAttributes.OrderBy(a => a.Name).ToList());
             _attrs = _attrList.ToDictionary(a => a.AttrId, a => (string?)a.AttrId);
             _attrIds = _attrList.ToDictionary(a => a, a => a.AttrId);
@@ -36,7 +35,6 @@ namespace Elwig.Windows {
 
             WineAttributeAddButton.IsEnabled = false;
             WineAttributeDeleteButton.IsEnabled = false;
-            SeasonList.IsEnabled = true;
         }
 
         private async Task WineAttributesSave() {