message: Fix MouseEntered calls twice (mac)
diff: @@ -67,8 +67,10 @@ class TimelineBaseCell: NSCollectionViewItem {
  }
  func initTrackingArea() {
  + if foregroundBox.trackingAreas.isEmpty {
  let tracking = NSTrackingArea(rect: view.bounds, options: [.mouseEnteredAndExited, .activeInActiveApp, .inVisibleRect], owner: self, userInfo: nil)
  foregroundBox.addTrackingArea(tracking)
  foregroundBox.updateTrackingAreas()
  }
  }
  +}
  