Make sure blocks list container is at least 100vh on mobile

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

@@ -1,4 +1,4 @@
-<div class="container-xl" [class]="widget ? 'widget' : ''">
+<div class="container-xl" [class]="widget ? 'widget' : 'full-height'">
   <h1 *ngIf="!widget" class="float-left" i18n="latest-blocks.blocks">Blocks</h1>
 
   <div class="clearfix"></div>