Add visually hidden <h1> to views that lack an overarching heading

src/popup/send/send-groupings.component.html

@@ -2,6 +2,7 @@
     <div class="left" *ngIf="showLeftHeader">
         <app-pop-out></app-pop-out>
     </div>
+    <h1 class="sr-only">{{'send' | i18n}}</h1>
     <div class="search">
         <input type="search" placeholder="{{'searchSends' | i18n}}" id="search" [(ngModel)]="searchText"
             (input)="search(200)" autocomplete="off" appAutofocus>

src/popup/send/send-type.component.html

@@ -5,6 +5,7 @@
             <span>{{'back' | i18n}}</span>
         </button>
     </div>
+    <h1 class="sr-only">{{'send' | i18n}}</h1>
     <div class="search">
         <input type="search" placeholder="{{'searchType' | i18n}}" id="search" [(ngModel)]="searchText"
             (input)="search(200)" autocomplete="off" appAutofocus>

src/popup/vault/ciphers.component.html

@@ -5,6 +5,7 @@
             <span>{{'back' | i18n}}</span>
         </button>
     </div>
+    <h1 class="sr-only">{{'myVault' | i18n}}</h1>
     <div class="search">
         <input type="{{searchTypeSearch ? 'search' : 'text'}}"
             placeholder="{{searchPlaceholder || ('searchVault' | i18n)}}" id="search" [(ngModel)]="searchText"

src/popup/vault/groupings.component.html

@@ -2,6 +2,7 @@
     <div class="left">
         <app-pop-out></app-pop-out>
     </div>
+    <h1 class="sr-only">{{'myVault' | i18n}}</h1>
     <div class="search">
         <input type="{{searchTypeSearch ? 'search' : 'text'}}" placeholder="{{'searchVault' | i18n}}" id="search"
             [(ngModel)]="searchText" (input)="search(200)" autocomplete="off" appAutofocus (keydown)="closeOnEsc($event)">