use accelerated rates for block templates & show in viz

frontend/src/app/components/mempool-block-overview/mempool-block-overview.component.ts

@@ -94,7 +94,6 @@ export class MempoolBlockOverviewComponent implements OnInit, OnDestroy, OnChang
 
   updateBlock(delta: MempoolBlockDelta): void {
     const blockMined = (this.stateService.latestBlockHeight > this.lastBlockHeight);
-
     if (this.blockIndex !== this.index) {
       const direction = (this.blockIndex == null || this.index < this.blockIndex) ? this.poolDirection : this.chainDirection;
       this.blockGraph.replace(delta.added, direction);