hopefully fixed CardInfoPopup freeze

cockatrice/src/abstractcarditem.cpp

@@ -212,6 +212,9 @@ void AbstractCardItem::mousePressEvent(QGraphicsSceneMouseEvent *event)
 
 void AbstractCardItem::mouseReleaseEvent(QGraphicsSceneMouseEvent *event)
 {
+	if (event->button() == Qt::MidButton)
+		emit deleteCardInfoPopup();
+	
 	// This function ensures the parent function doesn't mess around with our selection.
 	event->accept();
 }

cockatrice/src/messagelogwidget.cpp

@@ -572,7 +572,8 @@ void MessageLogWidget::mousePressEvent(QMouseEvent *event)
 
 void MessageLogWidget::mouseReleaseEvent(QMouseEvent *event)
 {
-	emit deleteCardInfoPopup();
+	if (event->button() == Qt::MidButton)
+		emit deleteCardInfoPopup();
 	
 	QTextEdit::mouseReleaseEvent(event);
 }

cockatrice/src/tab_game.cpp

@@ -783,7 +783,7 @@ Player *TabGame::getActiveLocalPlayer() const
 void TabGame::showCardInfoPopup(const QPoint &pos, const QString &cardName)
 {
 	infoPopup = new CardInfoWidget(CardInfoWidget::ModePopUp, 0, Qt::Widget | Qt::FramelessWindowHint | Qt::X11BypassWindowManagerHint | Qt::WindowStaysOnTopHint);
-	connect(infoPopup, SIGNAL(mouseReleased()), this, SLOT(deleteCardInfoPopup()));
+	infoPopup->setAttribute(Qt::WA_TransparentForMouseEvents);
 	infoPopup->setCard(cardName);
 	QRect screenRect = qApp->desktop()->screenGeometry(this);
 	infoPopup->show();
@@ -791,7 +791,6 @@ void TabGame::showCardInfoPopup(const QPoint &pos, const QString &cardName)
 		qMax(screenRect.left(), qMin(pos.x() - infoPopup->width() / 2, screenRect.left() + screenRect.width() - infoPopup->width())),
 		qMax(screenRect.top(), qMin(pos.y() - infoPopup->height() / 2, screenRect.top() + screenRect.height() - infoPopup->height()))
 	);
-	infoPopup->grabMouse();
 }
 
 void TabGame::deleteCardInfoPopup()