enhance Qt5 compatibility

- replace Q_WS_MAC (not supported anymore in Qt5) with Q_OS_MAC (supported
  in Qt4/5)

src/qt/bitcoingui.cpp

@@ -26,7 +26,7 @@
 #include "guiutil.h"
 #include "rpcconsole.h"
 
-#ifdef Q_WS_MAC
+#ifdef Q_OS_MAC
 #include "macdockiconhandler.h"
 #endif
 
@@ -70,7 +70,7 @@ BitcoinGUI::BitcoinGUI(QWidget *parent):
 {
     resize(850, 550);
     setWindowTitle(tr("Bitcoin") + " - " + tr("Wallet"));
-#ifndef Q_WS_MAC
+#ifndef Q_OS_MAC
     qApp->setWindowIcon(QIcon(":icons/bitcoin"));
     setWindowIcon(QIcon(":icons/bitcoin"));
 #else
@@ -183,7 +183,7 @@ BitcoinGUI::~BitcoinGUI()
 {
     if(trayIcon) // Hide tray icon, as deleting will let it linger until quit (on Ubuntu)
         trayIcon->hide();
-#ifdef Q_WS_MAC
+#ifdef Q_OS_MAC
     delete appMenuBar;
 #endif
 }
@@ -276,7 +276,7 @@ void BitcoinGUI::createActions()
 
 void BitcoinGUI::createMenuBar()
 {
-#ifdef Q_WS_MAC
+#ifdef Q_OS_MAC
     // Create a decoupled menu bar on Mac which stays even if the window is closed
     appMenuBar = new QMenuBar();
 #else
@@ -330,7 +330,7 @@ void BitcoinGUI::setClientModel(ClientModel *clientModel)
         if(clientModel->isTestNet())
         {
             setWindowTitle(windowTitle() + QString(" ") + tr("[testnet]"));
-#ifndef Q_WS_MAC
+#ifndef Q_OS_MAC
             qApp->setWindowIcon(QIcon(":icons/bitcoin_testnet"));
             setWindowIcon(QIcon(":icons/bitcoin_testnet"));
 #else
@@ -394,7 +394,7 @@ void BitcoinGUI::setWalletModel(WalletModel *walletModel)
 void BitcoinGUI::createTrayIcon()
 {
     QMenu *trayIconMenu;
-#ifndef Q_WS_MAC
+#ifndef Q_OS_MAC
     trayIcon = new QSystemTrayIcon(this);
     trayIconMenu = new QMenu(this);
     trayIcon->setContextMenu(trayIconMenu);
@@ -420,7 +420,7 @@ void BitcoinGUI::createTrayIcon()
     trayIconMenu->addSeparator();
     trayIconMenu->addAction(optionsAction);
     trayIconMenu->addAction(openRPCConsoleAction);
-#ifndef Q_WS_MAC // This is built-in on Mac
+#ifndef Q_OS_MAC // This is built-in on Mac
     trayIconMenu->addSeparator();
     trayIconMenu->addAction(quitAction);
 #endif
@@ -428,7 +428,7 @@ void BitcoinGUI::createTrayIcon()
     notificator = new Notificator(qApp->applicationName(), trayIcon);
 }
 
-#ifndef Q_WS_MAC
+#ifndef Q_OS_MAC
 void BitcoinGUI::trayIconActivated(QSystemTrayIcon::ActivationReason reason)
 {
     if(reason == QSystemTrayIcon::Trigger)
@@ -589,7 +589,7 @@ void BitcoinGUI::error(const QString &title, const QString &message, bool modal)
 void BitcoinGUI::changeEvent(QEvent *e)
 {
     QMainWindow::changeEvent(e);
-#ifndef Q_WS_MAC // Ignored on Mac
+#ifndef Q_OS_MAC // Ignored on Mac
     if(e->type() == QEvent::WindowStateChange)
     {
         if(clientModel && clientModel->getOptionsModel()->getMinimizeToTray())
@@ -609,7 +609,7 @@ void BitcoinGUI::closeEvent(QCloseEvent *event)
 {
     if(clientModel)
     {
-#ifndef Q_WS_MAC // Ignored on Mac
+#ifndef Q_OS_MAC // Ignored on Mac
         if(!clientModel->getOptionsModel()->getMinimizeToTray() &&
            !clientModel->getOptionsModel()->getMinimizeOnClose())
         {