If the main window has been minimized to the taskbar (iconified) calling "Show/Hide", "Send" or "Receive" actions from the tray icon menu has no effect: the main window still minimized.

It seems like a Qt bug similar to that old [one](https://bugreports.qt.io/browse/QTBUG-31117).

Tested platform: Linux Mint 19, Qt 5.9.5 / 5.9.6
void receivedURI(const QString &uri);
public Q_SLOTS:
    
    void setNumConnections(int count);
    
    void setNetworkActive(bool networkActive);
    
    void setNumBlocks(int count, const QDateTime& blockDate, double nVerificationProgress, bool headers);
    /** Notify the user of an event from the core network or transaction handling code.
       @param[in] title     the message box / notification title
       @param[in] message   the displayed text
       @param[in] style     modality and style definitions (icon and used buttons - buttons only for message boxes)
                            @see CClientUIInterface::MessageBoxFlags
       @param[in] ret       pointer to a bool that will be modified to whether Ok was clicked (modal only)
    */
    void message(const QString &title, const QString &message, unsigned int style, bool *ret = nullptr);
#ifdef ENABLE_WALLET
    bool setCurrentWallet(const QString& name);
    bool setCurrentWalletBySelectorIndex(int index);
    /** Set the UI status indicators based on the currently selected wallet.
    */
    void updateWalletStatus();
private:
    /** Set the encryption status as shown in the UI.
       @param[in] status            current encryption status
       @see WalletModel::EncryptionStatus
    */
    void setEncryptionStatus(int status);
    /** Set the hd-enabled status as shown in the UI.