restrict a ghost download to post race

packages/bridge-ui/src/app/components/race-details/race-details.component.html

@@ -71,7 +71,12 @@
     
             <ng-container matColumnDef="ghost">
                 <th mat-header-cell *matHeaderCellDef>Ghost</th>
+                @if(openToUploads) {
+                    <td mat-cell *matCellDef="let element"> <button mat-raised-button color="disabled"><mat-icon aria-hidden="false" aria-label="Example home icon" fontIcon="download"></mat-icon> Ghost</button> </td>
+                }
+                @else {
                     <td mat-cell *matCellDef="let element"> <button mat-raised-button color="accent" (click)="onClickDownloadGhost(element)"><mat-icon aria-hidden="false" aria-label="Example home icon" fontIcon="download"></mat-icon> Ghost</button> </td>
+                }
             </ng-container>
             
             <tr mat-header-row *matHeaderRowDef="displayedColumns"></tr>