Mac: NumericUpDown should show ‘0’ instead of ‘0.0’
Mac: Window KeyDown should fire, use PostKeyDown override for ListBox so default KeyDown event will work
Wpf: WpfFrameworkElement.UseKeyPreview added so key events can be overridden for common controls
WinForms: Bubble key events similarly to mouse events using a message filter, so that they bubble even if not handled by child controls
Gtk: Window.KeyDown event should fire *after* child control event fires