qmlprofiler: use dockwidgets instead of tabs in the output pane

Change-Id: I2c33c4309e6568a34517fae2bb37f5e70320cfbe
Reviewed-on: http://codereview.qt.nokia.com/35
Reviewed-by: hjk

src/plugins/qmlprofiler/tracewindow.cpp

@@ -73,6 +73,7 @@ class TracePlugin : public QDeclarativeDebugClient
 {
     Q_OBJECT
     Q_PROPERTY(bool recording READ recording WRITE setRecording NOTIFY recordingChanged)
+
 public:
     TracePlugin(QDeclarativeDebugConnection *client);