i18n: Fixed stacked mempool block issue and enabled vietnamese.

frontend/src/app/app.constants.ts

@@ -111,6 +111,6 @@ export const languages: Language[] = [
 // { code: 'th', name: 'ไทย' },             // Thai
    { code: 'tr', name: 'Türkçe' },          // Turkish
    { code: 'uk', name: 'Українська' },      // Ukrainian
-// { code: 'vi', name: 'Tiếng Việt' },      // Vietnamese
+   { code: 'vi', name: 'Tiếng Việt' },      // Vietnamese
    { code: 'zh', name: '中文' },            // Chinese
 ];

frontend/src/app/components/mempool-blocks/mempool-blocks.component.html

@@ -26,8 +26,8 @@
           </div>
           <ng-template #mergedBlock>
             <div class="time-difference">
-              <ng-container *ngTemplateOutlet="blocksPlural; context: {$implicit: projectedBlock.blockVSize / 1000000 | ceil }"></ng-container>
-              <b>(<ng-template #blocksPlural let-i i18n="shared.blocks">{{ i }} blocks</ng-template>)</b>
+              <b>(<ng-container *ngTemplateOutlet="blocksPlural; context: {$implicit: projectedBlock.blockVSize / 1000000 | ceil }"></ng-container>)</b>
+              <ng-template #blocksPlural let-i i18n="shared.blocks">{{ i }} blocks</ng-template>
             </div>
           </ng-template>
         </div>