message: Keep original focus state while a pane is dragged
diff: @@ -335,6 +335,7 @@ pub enum Action {
  Dragging {
  pane: Pane,
  origin: Point,
  + focus: Option<Pane>,
  },
  Resizing {
  split: Split,
  @@ -362,7 +363,7 @@ impl Internal {
  pub fn focused_pane(&self) -> Option<Pane> {
  match self.action {
  Action::Idle { focus } => focus,
  - Action::Dragging { pane, .. } => Some(pane),
  + Action::Dragging { focus, .. } => focus,
  Action::Resizing { focus, .. } => focus,
  }
  }
  @@ -376,7 +377,7 @@ impl Internal {
  pub fn picked_pane(&self) -> Option<(Pane, Point)> {
  match self.action {
  - Action::Dragging { pane, origin } => Some((pane, origin)),
  + Action::Dragging { pane, origin, .. } => Some((pane, origin)),
  _ => None,
  }
  }
  @@ -409,9 +410,12 @@ impl Internal {
  }
  pub fn pick_pane(&mut self, pane: &Pane, origin: Point) {
  + let focus = self.focused_pane();
  +
  self.action = Action::Dragging {
  pane: *pane,
  origin,
  + focus,
  };
  }
  