Ensure new tabs recieve correct IShellPage instance

Author: lukeblevins

Files/App.xaml.cs

@@ -40,7 +40,7 @@ public static IShellPage CurrentInstance
             }
             set
             {
-                if(value != currentInstance)
+                if(value != currentInstance && value != null)
                 {
                     currentInstance = value; 
                 }

Files/Controls/RibbonArea.xaml

@@ -1849,7 +1849,7 @@
                         Height="32.5"
                         Padding="2.5,0,0,0"
                         HorizontalAlignment="Stretch"
-                        VerticalAlignment="Stretch"
+                        VerticalAlignment="Center"
                         BorderBrush="{ThemeResource TextBoxBorderThemeBrush}"
                         BorderThickness="1"
                         CornerRadius="2"
@@ -1867,15 +1867,15 @@
                             x:Name="PathViewInteract"
                             x:FieldModifier="public"
                             Margin="0"
-                            VerticalAlignment="Center"
+                            VerticalAlignment="Stretch"
                             HorizontalContentAlignment="Stretch"
                             VerticalContentAlignment="Stretch"
                             Background="{ThemeResource TextControlBackground}"
                             CanReorderItems="False"
                             IsItemClickEnabled="True"
                             ItemClick="PathViewInteract_ItemClick"
                             ItemContainerStyle="{StaticResource ListViewItemContainerStyle_NoRevealBorder}"
-                            ItemsSource="{x:Bind local:App.CurrentInstance.PathComponents}"
+                            ItemsSource="{x:Bind local:App.CurrentInstance.PathComponents, Mode=OneWay}"
                             ScrollViewer.HorizontalScrollBarVisibility="Auto"
                             ScrollViewer.HorizontalScrollMode="Enabled"
                             ScrollViewer.VerticalScrollBarVisibility="Disabled"

Files/ProHome.xaml.cs

@@ -130,6 +130,8 @@ public ProHome()
                 App.AppSettings.DrivesManager.ShowUserConsentOnInit = false;
                 DisplayFilesystemConsentDialog();
             }
+
+            App.CurrentInstance = this as IShellPage;
         }
 
         private async void DisplayFilesystemConsentDialog()
@@ -150,10 +152,7 @@ protected override void OnNavigatedTo(NavigationEventArgs eventArgs)
 
         private void Page_Loaded(object sender, RoutedEventArgs e)
         {
-            if (App.CurrentInstance == null && ItemViewModel.GetCurrentSelectedTabInstance<ProHome>().Equals(this))
-            {
-                App.CurrentInstance = this as IShellPage;
-            }
+
 
             viewModel = new ItemViewModel();
             interactionOperation = new Interaction();