Implement Control.KeyUp
WinForms: Eliminate duplicate KeyDown event for Drawable/Scrollable
Rename KeyPressEventArgs to KeyEventArgs
Implement IsKeyUp/Down with modifier parameter to replace IsControl/Shift/AltKeyUp
Mac: Implement arrow keys for NumericUpDown to increment/decrement
Gtk: CheckBox should use mnemonic
Gtk: use built-in Key.ToShortcutString instead of platform-specific implementation
Gtk: Fix NRE when using a LinearGradientBrush without a transform
Mac: Auto recalculate view loop so Tab key works to navigate between controls when added after form is loaded
iOS: Fix Bitmap.DrawImage(Rectangle, Rectangle) and Bitmap.Clone() to get the right source part of the image
Mac/iOS: TextureBrush and LinearGradientBrush now use the current transform, not just the brush transform (to behave like other platforms)
Cleanup
WinForms: Windows should fire events for system keys (e.g. escape)