Don't change window maximized state when clicking a notification

cockatrice/src/tab_supervisor.cpp

@@ -437,7 +437,7 @@ TabMessage *TabSupervisor::addMessageTab(const QString &receiverName, bool focus
 }
 
 void TabSupervisor::maximizeMainWindow() {
-    emit maximize();
+    emit showWindowIfHidden();
 }
 
 void TabSupervisor::talkLeft(TabMessage *tab)

cockatrice/src/tab_supervisor.h

@@ -81,7 +81,7 @@ signals:
     void setMenu(const QList<QMenu *> &newMenuList = QList<QMenu *>());
     void localGameEnded();
     void adminLockChanged(bool lock);
-    void maximize();
+    void showWindowIfHidden();
 public slots:
     TabDeckEditor *addDeckEditorTab(const DeckLoader *deckToOpen);
     void openReplay(GameReplay *replay);

cockatrice/src/window_main.cpp

@@ -599,7 +599,7 @@ MainWindow::MainWindow(QWidget *parent)
     tabSupervisor = new TabSupervisor(client);
     connect(tabSupervisor, SIGNAL(setMenu(QList<QMenu *>)), this, SLOT(updateTabMenu(QList<QMenu *>)));
     connect(tabSupervisor, SIGNAL(localGameEnded()), this, SLOT(localGameEnded()));
-    connect(tabSupervisor, SIGNAL(maximize()), this, SLOT(maximize()));
+    connect(tabSupervisor, SIGNAL(showWindowIfHidden()), this, SLOT(showWindowIfHidden()));
     tabSupervisor->addDeckEditorTab(0);
 
     setCentralWidget(tabSupervisor);
@@ -703,8 +703,10 @@ void MainWindow::pixmapCacheSizeChanged(int newSizeInMBs)
     QPixmapCache::setCacheLimit(newSizeInMBs * 1024);
 }
 
-void MainWindow::maximize() {
-    showNormal();
+void MainWindow::showWindowIfHidden() {
+    // keep the previous window state
+    setWindowState(windowState() & ~Qt::WindowMinimized);
+    show();
 }
 
 /* CARD UPDATER */

cockatrice/src/window_main.h

@@ -69,7 +69,7 @@ private slots:
 
     void iconActivated(QSystemTrayIcon::ActivationReason reason);
 
-    void maximize();
+    void showWindowIfHidden();
 
     void actCheckCardUpdates();
     void cardUpdateError(QProcess::ProcessError err);