QmlProfiler: Fails to correctly stop if all categories are disabled

Steps to reproduce:

• open/create a simple Qml or QtQuick Application to be able to profile something
• switch to Debug view and select QmlProfiler
• open the drop down menu of the record button (the red bubble) and disable the categories one by one..
• start profiling
• profiler starts
• stop the application by using either the stop button or the applications close mechanism

Current result:

• profiling seems to stop, but the Stop button keeps being enabled, the profiling data seems not to become available (timeline and others keep displaying 'Profiling application')
• Stop button can be pressed again and again, but the application seems to be still running - command line prints

  Unexpected initiateStop() in state "RunControlState::Stopping"
  Invalid run control state transition from  "RunControlState::Stopping"  to  "RunControlState::Stopping" 

• you have to kill the application either from the cmdline or use the stop button from the application output pane
• the next profiling attempt will fail

  Could not connect to the in-process QML profiler within 2 s.
  Do you want to retry and wait 4 s? 

  , but when canceling this one the profiling attempt after the failed one will succeed again