Update i18n messages.

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

@@ -317,13 +317,6 @@
 
 <br>
 
-<ng-template let-i #nextBlockEtaPlural i18n="mempool-blocks.eta-of-next-block-plural|Block Frequency (plural)">In ~{{ i }} minutes</ng-template>
-
-<ng-template let-i #nextBlockEta i18n="mempool-blocks.eta-of-next-block|Block Frequency">In ~{{ i }} minute</ng-template>
-
-<ng-template #blocksSingular let-i i18n="shared.block">{{ i }} <span class="shared-block">block</span></ng-template>
-<ng-template #blocksPlural let-i i18n="shared.blocks">{{ i }} <span class="shared-block">blocks</span></ng-template>
-
 <ng-template #feeTable>
   <table class="table table-borderless table-striped">
     <tbody>

frontend/src/app/dashboard/dashboard.component.html

@@ -216,7 +216,7 @@
           <div class="item">
             <h5 class="card-title" i18n="difficulty-box.estimate">Estimate</h5>
             <div class="card-text" [ngStyle]="{'color': epochData.colorAdjustments}">{{epochData.change > 0 ? '+' : ''}}{{ epochData.change | number: '1.2-2' }} <span class="symbol">%</span></div>
-            <div class="symbol"><span i18n="difficulty-box.previous">Previous</span>: {{epochData.previousRetarget > 0 ? '+' : ''}}{{ epochData.previousRetarget | number: '1.2-2' }} %</div>
+            <div class="symbol" i18n="difficulty-box.previous-retarget">Previous: {{epochData.previousRetarget > 0 ? '+' : ''}}{{ epochData.previousRetarget | number: '1.2-2' }} %</div>
           </div>
           <div class="item">
             <h5 class="card-title" i18n="difficulty-box.current-period">Current Period</h5>