Fix escape key for "About Qt Creator"

Change-Id: I15c49541a6914c8db58784935de43f0b046895b0
Reviewed-by: Robert Loehning <robert.loehning@digia.com>

src/plugins/coreplugin/versiondialog.cpp

@@ -36,6 +36,7 @@
 
 #include <QDialogButtonBox>
 #include <QGridLayout>
+#include <QKeyEvent>
 #include <QLabel>
 #include <QPushButton>
 
@@ -97,3 +98,15 @@ VersionDialog::VersionDialog(QWidget *parent)
     layout->addWidget(copyRightLabel, 0, 1, 4, 4);
     layout->addWidget(buttonBox, 4, 0, 1, 5);
 }
+
+bool VersionDialog::event(QEvent *event)
+{
+    if (event->type() == QEvent::ShortcutOverride) {
+        QKeyEvent *ke = static_cast<QKeyEvent *>(event);
+        if (ke->key() == Qt::Key_Escape && !ke->modifiers()) {
+            ke->accept();
+            return true;
+        }
+    }
+    return QDialog::event(event);
+}