Tweak move bindingsource iteration

Create datasource before the foreach to avoid multiple .Where(),
possibly fixing #151

MainWindow/Main.cs

@@ -1060,10 +1060,11 @@ private void populateFilteredDataSources()
             CB_GameOrigin.DataSource = new BindingSource(VersionDataSource.Where(g => g.Value <= SAV.MaxGameID || SAV.Generation >= 3 && g.Value == 15), null);
 
             // Set the Move ComboBoxes too..
+            var moves = MoveDataSource.Where(m => m.Value <= SAV.MaxMoveID).ToArray();
             foreach (ComboBox cb in new[] { CB_Move1, CB_Move2, CB_Move3, CB_Move4, CB_RelearnMove1, CB_RelearnMove2, CB_RelearnMove3, CB_RelearnMove4 })
             {
                 cb.DisplayMember = "Text"; cb.ValueMember = "Value";
-                cb.DataSource = new BindingSource(MoveDataSource.Where(m => m.Value <= SAV.MaxMoveID), null);
+                cb.DataSource = new BindingSource(moves, null);
             }
         }
         private Action getFieldsfromPKM;