[REG Qt 5.11.2 -> Qt 5.12.0-beta4] The QML Profiler's overview bar is empty.

1. Make sure your Creator is built on Qt 5.12.
   I used Qt 5.12.0 beta4 in my own builds
2. Record some data with the QML Profiler.
3. Show the Timeline view.
   The Timeline shows the data, but the overview bar on the bottom is completely empty:
   

This bar should show an overview over all the recorded events. When building Creator on Qt 5.11.2, this works fine.