QmlProfiler: set clip in timelineview

Otherwise the user can mouseover events that are not displayed.

Change-Id: I8108cfbf730708bbad4a6d2cc812ee1b3a1a444a
Reviewed-on: http://codereview.qt.nokia.com/457Reviewed-by: Qt Sanity Bot <qt_sanity_bot@ovi.com>
Reviewed-by: Kai Koehne <kai.koehne@nokia.com>

src/plugins/qmlprofiler/qml/MainView.qml

@@ -156,6 +156,8 @@ Rectangle {
         contentHeight: height
         flickableDirection: Flickable.HorizontalFlick
 
+        clip:true
+
         TimelineView {
             id: view