Fixes the "Card preview window gets stuck and can't be removed" issue by...

Fixes the "Card preview window gets stuck and can't be removed" issue by saving the cardname, instead of getting it back from the popup (with possible issues with case sensitivity). Also closes an old popup when a new is created.

cockatrice/src/tab.cpp

@@ -10,6 +10,10 @@ Tab::Tab(TabSupervisor *_tabSupervisor, QWidget *parent)
 
 void Tab::showCardInfoPopup(const QPoint &pos, const QString &cardName)
 {
+    if (infoPopup) {
+        infoPopup->deleteLater();
+    }
+	currentCardName = cardName;
     infoPopup = new CardInfoWidget(CardInfoWidget::ModePopUp, cardName, 0, Qt::Widget | Qt::FramelessWindowHint | Qt::X11BypassWindowManagerHint | Qt::WindowStaysOnTopHint);
     infoPopup->setAttribute(Qt::WA_TransparentForMouseEvents);
     QRect screenRect = qApp->desktop()->screenGeometry(this);
@@ -23,7 +27,7 @@ void Tab::showCardInfoPopup(const QPoint &pos, const QString &cardName)
 void Tab::deleteCardInfoPopup(const QString &cardName)
 {
     if (infoPopup) {
-        if ((infoPopup->getCardName() == cardName) || (cardName == "_")) {
+        if ((currentCardName == cardName) || (cardName == "_")) {
             infoPopup->deleteLater();
             infoPopup = 0;
         }

cockatrice/src/tab.h

@@ -19,6 +19,7 @@ protected slots:
     void showCardInfoPopup(const QPoint &pos, const QString &cardName);
     void deleteCardInfoPopup(const QString &cardName);
 private:
+    QString currentCardName;
     bool contentsChanged;
     CardInfoWidget *infoPopup;
     QList<QMenu *> tabMenus;