QmlProfiler: SoftAssert in qmlprofilerstatisticsview.cpp

SoftAssert in qmlprofilerstatisticsview.cpp:303 seems to be a legit case as it can be easily triggered. Please check whether this should be silenced or has another cause that should be fixed..

Steps to reproduce:

• create Qt Quick Application - Empty from template (I've used Qt5.9 kit if that matters)
• start profiling
• after some seconds stop the profiler
• click on one of the events inside the timeline (triggers the soft assert)