Binding loop in FlameGraphDetails.qml

1. Start Creator from a terminal window.
2. Record some data into the QML Profiler.
3. Show the Flamegraph tab.
4. Hover the mouse over the graph.
   You'll see error messages in the terminal window:

   qrc:/flamegraph/FlameGraphDetails.qml:169:13: QML Text: Binding loop detected for property "width"
   

   The graph looks alright, though.

If the error messages point to a real problem, that should be fixed. If not, the messages should be silenced.