Fix NaN boost

frontend/src/app/components/acceleration/accelerations-list/accelerations-list.component.html

@@ -40,7 +40,7 @@
           </ng-container>
           <ng-container *ngIf="!pending">
             <td *ngIf="acceleration.boost != null" class="fee text-right">
-              {{ (acceleration.boost) | number }} <span class="symbol" i18n="shared.sat|sat">sat</span>
+              {{ acceleration.boost | number }} <span class="symbol" i18n="shared.sat|sat">sat</span>
             </td>
             <td *ngIf="acceleration.boost == null" class="fee text-right">
               ~

frontend/src/app/components/acceleration/accelerations-list/accelerations-list.component.ts

@@ -58,7 +58,7 @@ export class AccelerationsListComponent implements OnInit {
               }
             }
             for (const acc of accelerations) {
-              acc.boost = acc.boostCost || (acc.feePaid - acc.baseFee - acc.vsizeFee);
+              acc.boost = acc.boostCost != null ? acc.boostCost : (acc.feePaid - acc.baseFee - acc.vsizeFee);
             }
             if (this.widget) {
               return of(accelerations.slice(0, 6));