Refactord blockchain is rendering, block arrow location propagation and keynavigation.

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

@@ -1,3 +1,7 @@
+<div class="container-xl">
+
+<hr>
+
 <table class="table table-borderless" [alwaysCallback]="true" [fromRoot]="true" [infiniteScrollContainer]="'body'" infiniteScroll [infiniteScrollDistance]="1.5" [infiniteScrollUpDistance]="1.5" [infiniteScrollThrottle]="50" (scrolled)="loadMore()">
   <thead>
     <th style="width: 15%;">Height</th>
@@ -30,3 +34,5 @@
     </ng-template>
   </tbody>
 </table>
+
+</div>