Reset search on page change

client/src/app/header/header.component.ts

@@ -18,10 +18,9 @@ export class HeaderComponent implements OnInit {
     this.router.events
         .pipe(
           filter(e => e instanceof NavigationEnd),
-          map(() => getParameterByName('search', window.location.href)),
-          filter(searchQuery => !!searchQuery)
+          map(() => getParameterByName('search', window.location.href))
         )
-        .subscribe(searchQuery => this.searchValue = searchQuery)
+        .subscribe(searchQuery => this.searchValue = searchQuery || '')
   }
 
   doSearch () {