message: add layout for "awaiting confirmation" label in tx list
diff: <span class="currency-name">NANO</span>
  </span>
  </td>
  - <td class="date-column uk-text-middle uk-text-truncate uk-text-muted" *ngIf="!history.local_timestamp">N/A</td>
  - <td class="date-column uk-text-middle uk-text-truncate" *ngIf="history.local_timestamp">{{ history.local_timestamp * 1000 | date: 'MMM d, y HH:mm:ss' }}</td>
  + <td class="date-column uk-text-middle uk-text-truncate" [class.uk-text-muted]="!history.local_timestamp">
  + {{ history.local_timestamp ? ( history.local_timestamp * 1000 | date: 'MMM d, y HH:mm:ss' ) : 'N/A' }}
  + <ng-container *ngIf="(history.confirmed === false)">
  + <br>
  + <div class="uk-text-small uk-text-muted">Awaiting confirmation</div>
  + </ng-container>
  + </td>
  </tr>
  <tr *ngIf="!accountHistory.length && !pendingBlocks.length">
  <td colspan="4" style="text-align: center;">No account history</td>
  