message: Fix documentation of `PlatformSpecific` settings
diff: /// The platform specific window settings of an application.
  #[derive(Debug, Clone, Copy, PartialEq, Eq)]
  pub struct PlatformSpecific {
  - /// Parent Window
  + /// Parent window
  pub parent: Option<winapi::shared::windef::HWND>,
  - /// Drap and Drop support
  +
  + /// Drag and drop support
  pub drag_and_drop: bool,
  }
  