Clicking on the same element in the hamburger view should re-open that view, like the menu items do (#447)

Fixes #437.
Clicking on the same element in the hamburger view should re-open that view, like the menu items do

Description of the changes:
-Fixed the bug that was listed

How changes were validated:
-manual

src/Calculator/Views/MainPage.xaml

@@ -100,6 +100,7 @@
                              PaneOpened="OnNavPaneOpened"
                              PaneOpening="OnNavPaneOpening"
                              SelectionChanged="OnNavSelectionChanged"
+                             ItemInvoked="OnNavItemInvoked"
                              TabIndex="1"
                              UseSystemFocusVisuals="True">
             <muxc:NavigationView.PaneFooter>

src/Calculator/Views/MainPage.xaml.cpp

@@ -524,3 +524,8 @@ void MainPage::AnnounceCategoryName()
     NarratorAnnouncement^ announcement = CalculatorAnnouncement::GetCategoryNameChangedAnnouncement(categoryName);
     NarratorNotifier->Announce(announcement);
 }
+
+void MainPage::OnNavItemInvoked(MUXC::NavigationView^ /*sender*/, _In_ MUXC::NavigationViewItemInvokedEventArgs^ e)
+{
+    NavView->IsPaneOpen = false;
+}

src/Calculator/Views/MainPage.xaml.h

@@ -49,6 +49,7 @@ namespace CalculatorApp
         void OnNavPaneOpened(_In_ Microsoft::UI::Xaml::Controls::NavigationView^ sender, _In_ Platform::Object^ args);
         void OnNavPaneClosed(_In_ Microsoft::UI::Xaml::Controls::NavigationView^ sender, _In_ Platform::Object^ args);
         void OnNavSelectionChanged(_In_ Platform::Object^ sender, _In_ Microsoft::UI::Xaml::Controls::NavigationViewSelectionChangedEventArgs^ e);
+        void OnNavItemInvoked(Microsoft::UI::Xaml::Controls::NavigationView^ /*sender*/, _In_ Microsoft::UI::Xaml::Controls::NavigationViewItemInvokedEventArgs^ e);
 
         void OnAboutButtonClick(_In_ Platform::Object^ sender, _In_ Windows::UI::Xaml::Controls::ItemClickEventArgs^ e);
         void OnAboutFlyoutOpened(_In_ Platform::Object^ sender, _In_ Platform::Object^ e);