Adding ability to hide deleted events

Frontend/src/app/components/day/day.component.html

@@ -1,4 +1,4 @@
 <h1>{{weekDayName}}</h1>
 <div *ngFor="let event of events">
-    <app-event [event]="event"></app-event>
+    <app-event [event]="event" *ngIf="!(!showDeletedEvents && event.changes[event.changes.length-1].is_deleted)"></app-event>
 </div>