- Do not show dismiss link whne there are no notifications (#4493)

- Do not redirect to homepage whne dismiss link is clicked

Author: vnbaaij

examples/Demo/Shared/Components/NotificationCenterPanel.razor

@@ -5,9 +5,12 @@
 
     <FluentStack>
         <FluentSpacer />
-        <FluentAnchor Appearance="@Appearance.Hypertext" Href="" OnClick="@(e => MessageService.Clear(App.MESSAGES_NOTIFICATION_CENTER) )">
-            Dismiss all
-        </FluentAnchor>
+		@if (MessageService.Count(App.MESSAGES_NOTIFICATION_CENTER) > 0)
+		{
+			<FluentAnchor Appearance="@Appearance.Hypertext" Href="#" OnClick="@(e => MessageService.Clear(App.MESSAGES_NOTIFICATION_CENTER))">
+				Dismiss all
+			</FluentAnchor>
+		}
     </FluentStack>
 
     <br />