Correction du bug de la grille d'operation

source/Trek-12/Models/Game/Map.cs

@@ -109,7 +109,7 @@ namespace Models.Game
             {
                 for (int j = 0; j < 4; j++) // 4 cells per operation
                 {
-                    operationGrid.Add(new OperationCell(i, j));
+                    operationGrid.Add(new OperationCell(j, i));
                 }
             }
         }

source/Trek-12/Trek-12/Views/PageBoard.xaml

@@ -87,12 +87,12 @@
             <!--Grille de la partie-->
             <CollectionView Grid.Column="1"
                             ItemsSource="{Binding UsedMap.OperationGrid}"
-                            ItemsLayout="VerticalGrid,4"
                             WidthRequest="200"
                             HeightRequest="250"
                             BackgroundColor="Transparent"
                             SelectionChanged="OnOperationCellSelected"
-                            Margin="50">
+                            Margin="50"
+                            ItemsLayout="VerticalGrid,4">
             <CollectionView.ItemTemplate>
                     <DataTemplate>
                         <Frame HasShadow="True"