Debugger: Simplify raise-on-stop logic

Also slightly change meaning (now all stops may cause raising).

Change-Id: Ie3fee7371ab119e4e9747dc44a4d8ef2cd62c8d8
Reviewed-by: Eike Ziller <eike.ziller@digia.com>

src/plugins/debugger/debuggerplugin.cpp

@@ -2109,7 +2109,6 @@ void DebuggerPluginPrivate::connectEngine(DebuggerEngine *engine)
     m_inspectorWindow->setModel(engine->watchModel());
 
     mainWindow()->setEngineDebugLanguages(engine->startParameters().languages);
-    mainWindow()->setCurrentEngine(engine);
 }
 
 static void changeFontSize(QWidget *widget, qreal size)