Basic address tracking.

frontend/src/app/components/blockchain/blockchain.component.html

@@ -1,14 +1,17 @@
-<div *ngIf="isLoading" class="loading-block">
-  <h3>Waiting for blocks...</h3>
-  <br>
-  <div class="spinner-border text-light"></div>
-</div>
 <div class="text-center" class="blockchain-wrapper">
   <div class="position-container" [ngStyle]="{'top': position === 'top' ? '75px' : 'calc(50% - 60px)'}">
     <app-mempool-blocks [txFeePerVSize]="txFeePerVSize"></app-mempool-blocks>
     <app-blockchain-blocks [markHeight]="markHeight"></app-blockchain-blocks>
 
-    <div id="divider" *ngIf="!isLoading"></div>
-  </div>
+    <div id="divider" *ngIf="!isLoading; else loadingTmpl"></div>
 
+    <ng-template #loadingTmpl>
+      <div class="loading-block">
+        <h3>Waiting for blocks...</h3>
+        <br>
+        <div class="spinner-border text-light"></div>
+      </div>
+    </ng-template>
+
+  </div>
 </div>