Use tab navigation mode of ItemsPresenter

When creating ItemsPresenter's panel

Perspex.Controls/Presenters/ItemsPresenter.cs

@@ -24,6 +24,13 @@ namespace Perspex.Controls.Presenters
 
         private bool createdPanel;
 
+        static ItemsPresenter()
+        {
+            KeyboardNavigation.TabNavigationProperty.OverrideDefaultValue(
+                typeof(ItemsPresenter),
+                KeyboardNavigationMode.Once);
+        }
+
         public ItemsPresenter()
         {
             this.GetObservableWithHistory(ItemsProperty).Subscribe(this.ItemsChanged);
@@ -78,7 +85,7 @@ namespace Perspex.Controls.Presenters
             this.ClearVisualChildren();
             this.Panel = this.ItemsPanel.Build();
             this.Panel.TemplatedParent = this;
-            KeyboardNavigation.SetTabNavigation(this.Panel, KeyboardNavigationMode.Once);
+            KeyboardNavigation.SetTabNavigation(this.Panel, KeyboardNavigation.GetTabNavigation(this));
             ((IItemsPanel)this.Panel).ChildLogicalParent = this.TemplatedParent as ILogical;
             this.AddVisualChild(this.Panel);
             this.createdPanel = true;

Tests/Perspex.Controls.UnitTests/Presenters/ItemsPresenterTests.cs

@@ -48,6 +48,17 @@ namespace Perspex.Controls.UnitTests.Presenters
             Assert.Equal(KeyboardNavigationMode.Once, KeyboardNavigation.GetTabNavigation(target.Panel));
         }
 
+        [Fact]
+        public void Panel_TabNavigation_Should_Be_Set_To_ItemsPresenter_Value()
+        {
+            var target = new ItemsPresenter();
+
+            KeyboardNavigation.SetTabNavigation(target, KeyboardNavigationMode.Cycle);
+            target.ApplyTemplate();
+
+            Assert.Equal(KeyboardNavigationMode.Cycle, KeyboardNavigation.GetTabNavigation(target.Panel));
+        }
+
         [Fact]
         public void Panel_Should_Be_Visual_Child()
         {