message: Clarify `TitleBar::always_show_controls` docs a bit
diff: @@ -68,12 +68,15 @@ where
  self
  }
  - /// Sets whether or not the [`controls`] attached to this
  - /// panes [`TitleBar`] are always visible. By default, the controls
  - /// are only visible on hover.
  + /// Sets whether or not the [`controls`] attached to this [`TitleBar`] are
  + /// always visible.
  + ///
  + /// By default, the controls are only visible when the [`Pane`] of this
  + /// [`TitleBar`] is hovered.
  ///
  /// [`TitleBar`]: struct.TitleBar.html
  /// [`controls`]: struct.TitleBar.html#method.controls
  + /// [`Pane`]: struct.Pane.html
  pub fn always_show_controls(mut self) -> Self {
  self.always_show_controls = true;
  self
  