MemberAdminWindow: Add pending member movement export

Elwig/Helpers/Export/CsvFile.cs

@@ -29,11 +29,6 @@ namespace Elwig.Helpers.Export {
             _writer.Dispose();
         }
 
-        public ValueTask DisposeAsync() {
-            GC.SuppressFinalize(this);
-            return _writer.DisposeAsync();
-        }
-
         public async Task ExportAsync(IEnumerable<T> data, IProgress<double>? progress = null) {
             progress?.Report(0.0);
             int count = data.Count() + 2, i = 0;
@@ -50,10 +45,6 @@ namespace Elwig.Helpers.Export {
             progress?.Report(100.0);
         }
 
-        public void Export(IEnumerable<T> data, IProgress<double>? progress = null) {
-            ExportAsync(data, progress).GetAwaiter().GetResult();
-        }
-
         public string FormatRow(IEnumerable row) {
             return string.Join(Separator, row);
         }