style(mail): Rename menu item for blocking senders.

Author: gtandersen

src/app/mailviewer/singlemailviewer.component.html

@@ -86,7 +86,7 @@
           Allow Sender
         </button>
         <button mat-menu-item (click)="messageActionsHandler.blockSender(mailObj.from[0].address)">
-          Block Sender Email
+          Block Sender
         </button>
         <button mat-menu-item (click)="messageActionsHandler.blockSender(mailObj.from[0].domain)">
           Block Sender Domain