Another fix for closeable tabs

Author: rds1983

samples/Myra.Samples.CustomUIStylesheet/Myra.Samples.CustomUIStylesheet.FNA.Core.csproj

@@ -14,4 +14,5 @@
 
   <ItemGroup>
     <ProjectReference Include="..\..\src\Myra\Myra.FNA.Core.csproj" />
-  </ItemGroup></Project>
+  </ItemGroup>
+</Project>

src/Myra/Graphics2D/UI/Properties/PropertyGrid.cs

@@ -206,6 +206,8 @@ public object Object
 
 				_object = value;
 				Rebuild();
+
+				ObjectChanged?.Invoke(this, EventArgs.Empty);
 			}
 		}
 
@@ -340,6 +342,7 @@ public string Filter
 		public Func<Record, object, Widget> CustomWidgetProvider;
 
 		public event EventHandler<GenericEventArgs<string>> PropertyChanged;
+		public event EventHandler ObjectChanged;
 
 		private PropertyGrid(TreeStyle style, string category, Record parentProperty, PropertyGrid parentGrid = null)
 		{

src/Myra/Graphics2D/UI/Selectors/TabControl.cs

@@ -230,7 +230,6 @@ protected override void InsertItem(TabItem item, int index)
 
 			var button = new ListViewButton
 			{
-				Tag = item,
 				HorizontalAlignment = HorizontalAlignment.Stretch,
 				VerticalAlignment = VerticalAlignment.Stretch,
 				Height = item.Height,
@@ -246,10 +245,13 @@ protected override void InsertItem(TabItem item, int index)
 
 			if (!CloseableTabs)
 			{
+				button.Tag = item;
 				_gridButtons.Widgets.Insert(index, button);
 			} else
 			{
 				var topItemPanel = new HorizontalStackPanel();
+				topItemPanel.Tag = item;
+
 				topItemPanel.Widgets.Add(button);
 				StackPanel.SetProportionType(button, ProportionType.Fill);