message: qt, refactor: Cleanup ModalOverlay slots
diff: @@ -25,16 +25,17 @@ public:
  explicit ModalOverlay(bool enable_wallet, QWidget *parent);
  ~ModalOverlay();
  -public Q_SLOTS:
  void tipUpdate(int count, const QDateTime& blockDate, double nVerificationProgress);
  void setKnownBestHeight(int count, const QDateTime& blockDate);
  - void toggleVisibility();
  // will show or hide the modal layer
  void showHide(bool hide = false, bool userRequested = false);
  - void closeClicked();
  bool isLayerVisible() const { return layerIsVisible; }
  +public Q_SLOTS:
  + void toggleVisibility();
  + void closeClicked();
  +
  protected:
  bool eventFilter(QObject * obj, QEvent * ev) override;
  bool event(QEvent* ev) override;
  