debug : adds DEBUG_ON flag

- if DEBUG_ON is set to true, the console can be opened by
  hitting F5. Otherwise the console cannot be opened by the user.

Change-Id: Icceb8e708cca14ec0d73e4267e5c461ca8961b20
Tuleap: #790

Globals.h

@@ -26,4 +26,5 @@ public enum class ContactStatus {
     READY
 };
 
+constexpr bool DEBUG_ON = false;
 }
\ No newline at end of file

MainPage.xaml.cpp

@@ -107,10 +107,11 @@ MainPage::MainPage()
 void
 MainPage::OnKeyDown(KeyRoutedEventArgs^ e)
 {
-    if (e->Key == VirtualKey::F5) {
-        _outerSplitView_->OpenPaneLength = Window::Current->Bounds.Width;
-        _outerSplitView_->IsPaneOpen = !_outerSplitView_->IsPaneOpen;
-    }
+    if (DEBUG_ON)
+        if (e->Key == VirtualKey::F5) {
+            _outerSplitView_->OpenPaneLength = Window::Current->Bounds.Width;
+            _outerSplitView_->IsPaneOpen = !_outerSplitView_->IsPaneOpen;
+        }
 }
 
 void RingClientUWP::MainPage::_toggleSmartBoxButton__Click(Platform::Object^ sender, Windows::UI::Xaml::RoutedEventArgs^ e)