Changed some observable collections types for HamburgerMenu binding (issue with WinRT 8.1)

Restored CollectionViewSource for recent (issue with WinRT 8.1)
Forbid horizontal scrolling in Main Menu
Fixed an incorrect SetupFocusAction target object binding

ModernKeePass/Views/GroupDetailPage.xaml

@@ -79,7 +79,7 @@
                             CanDragItems="{Binding IsEditMode}">
                             <interactivity:Interaction.Behaviors>
                                 <core:DataTriggerBehavior Binding="{Binding IsEditMode}" Value="False">
-                                    <actions:SetupFocusAction TargetObject="{Binding}" />
+                                    <actions:SetupFocusAction TargetObject="{Binding ElementName=GridView}" />
                                 </core:DataTriggerBehavior>
                                 <core:EventTriggerBehavior EventName="SelectionChanged">
                                     <core:InvokeCommandAction Command="{Binding GoToEntryCommand}" CommandParameter="{Binding SelectedItem, ElementName=GridView}" />

ModernKeePass/Views/MainPage.xaml

@@ -57,6 +57,7 @@
             Grid.Column="0"
             Grid.Row="1"
             x:Name="MenuListView"
+            ScrollViewer.VerticalScrollMode="Disabled"
             SelectionChanged="ListView_SelectionChanged" 
             Background="{ThemeResource AppBarBackgroundThemeBrush}"
             ItemsSource="{Binding Source={StaticResource MenuItemsSource}}"

ModernKeePass/Views/MainPageFrames/RecentDatabasesPage.xaml

@@ -9,6 +9,11 @@
     mc:Ignorable="d"
     DataContext="{Binding Source={StaticResource Locator}, Path=Recent}">
     <Grid Background="{StaticResource ApplicationPageBackgroundThemeBrush}">
+        <Grid.Resources>
+            <CollectionViewSource 
+            x:Name="RecentItemsSource" 
+            Source="{Binding RecentItems}" />
+        </Grid.Resources>
         <Grid.RowDefinitions>
             <RowDefinition Height="40" />
             <RowDefinition Height="*" />
@@ -21,7 +26,7 @@
         </HyperlinkButton>
         <controls:SelectableTemplateListView Grid.Row="1"
             SelectedIndex="{Binding SelectedIndex}"
-            ItemsSource="{Binding RecentItems}"
+            ItemsSource="{Binding Source={StaticResource RecentItemsSource}}"
             ItemContainerStyle="{StaticResource ListViewLeftIndicatorItemExpanded}">
             <controls:SelectableTemplateListView.SelectedItemTemplate>
                 <DataTemplate>

ModernKeePass/Views/UserControls/HamburgerMenuUserControl.xaml.cs

@@ -7,6 +7,7 @@ using Windows.UI.Xaml.Controls;
 using Windows.UI.Xaml.Input;
 using ModernKeePass.Application.Common.Interfaces;
 using ModernKeePass.Controls;
+using System.Collections.ObjectModel;
 
 // The User Control item template is documented at http://go.microsoft.com/fwlink/?LinkId=234236
 
@@ -62,18 +63,18 @@ namespace ModernKeePass.Views.UserControls
                 typeof(HamburgerMenuUserControl),
                 new PropertyMetadata(Visibility.Collapsed, (o, args) => { }));
 
-        public IEnumerable<IEntityVm> ItemsSource
+        public ObservableCollection<IEntityVm> ItemsSource
         {
-            get { return (IEnumerable<IEntityVm>)GetValue(ItemsSourceProperty); }
+            get { return (ObservableCollection<IEntityVm>)GetValue(ItemsSourceProperty); }
             set { SetValue(ItemsSourceProperty, value); }
         }
 
         public static readonly DependencyProperty ItemsSourceProperty =
             DependencyProperty.Register(
                 nameof(ItemsSource),
-                typeof(IEnumerable<IEntityVm>),
+                typeof(ObservableCollection<IEntityVm>),
                 typeof(HamburgerMenuUserControl),
-                new PropertyMetadata(new List<IEntityVm>(), (o, args) => { }));
+                new PropertyMetadata(new ObservableCollection<IEntityVm>(), (o, args) => { }));
 
         public object SelectedItem
         {