Merge pull request #25 from rjskr01/master

bug(EJ2-000): custom toolbar sample issue was fixed

Author: kmuthukumar23

ej2-blazor-samples/Pages/Viewer/PdfViewer/CustomToolbar.razor

@@ -1,5 +1,5 @@
 @page "/Viewer/CustomToolbar"
-
+@using Syncfusion.EJ2.RazorComponents.Navigations
 @using Syncfusion.EJ2.RazorComponents.PdfViewer
 @inject IJSRuntime JsRuntime;
 @inject HttpClient Http;