FIX unify the units css. (#499)

* FIX unify the units css.
* Fix units css font-size.

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

@@ -10,7 +10,7 @@
           <div class="fee-span">
             {{ projectedBlock.feeRange[0] | number:'1.0-0' }} - {{ projectedBlock.feeRange[projectedBlock.feeRange.length - 1] | number:'1.0-0' }} <span i18n="shared.sat-vbyte|sat/vB">sat/vB</span>
           </div>
-          <div class="block-size">&lrm;{{ projectedBlock.blockSize | bytes: 2 }}</div>
+          <div class="block-size" [innerHTML]="projectedBlock.blockSize | bytes: 2">&lrm;</div>
           <div class="transaction-count">
             <ng-container *ngTemplateOutlet="projectedBlock.nTx === 1 ? transactionsSingular : transactionsPlural; context: {$implicit: projectedBlock.nTx | number}"></ng-container>
             <ng-template #transactionsSingular let-i i18n="shared.transaction-count.singular">{{ i }} transaction</ng-template>