Merge pull request #10271 from MrJul/fix-devtools-handled-event

Dev tools: fixed wrong HandledBy for events

src/Avalonia.Diagnostics/Diagnostics/ViewModels/EventTreeNode.cs

@@ -115,7 +115,7 @@ namespace Avalonia.Diagnostics.ViewModels
                     var link = _currentEvent.EventChain[linkIndex];
 
                     link.Handled = true;
-                    _currentEvent.HandledBy = link;
+                    _currentEvent.HandledBy ??= link;
                 }
             }
 

src/Avalonia.Diagnostics/Diagnostics/Views/EventsPageView.xaml

@@ -29,6 +29,7 @@
 
     <Style Selector="ListBoxItem.handled" >
       <Setter Property="Background" Value="#d9ffdc" />
+      <Setter Property="Foreground" Value="Black" />
     </Style>
   </UserControl.Styles>