historycompleter: make key explicit

Change-Id: I1560e379639a02a2decf46c4e6b015bd6042c6b7
Reviewed-by: hjk <qthjk@ovi.com>

src/plugins/coreplugin/mainwindow.cpp

@@ -82,6 +82,7 @@
 #include <coreplugin/icorelistener.h>
 #include <coreplugin/inavigationwidgetfactory.h>
 #include <coreplugin/settingsdatabase.h>
+#include <utils/historycompleter.h>
 #include <utils/pathchooser.h>
 #include <utils/stylehelper.h>
 #include <utils/stringutils.h>
@@ -175,6 +176,8 @@ MainWindow::MainWindow() :
     (void) new DocumentManager(this);
     OutputPaneManager::create();
 
+    Utils::HistoryCompleter::setSettings(m_settings);
+
     setWindowTitle(tr("Qt Creator"));
 #ifndef Q_OS_MAC
     QApplication::setWindowIcon(QIcon(QLatin1String(Constants::ICON_QTLOGO_128)));