QmlProfiler: Move action registration out of QmlProfilerTool

This enables us to have multiple QmlProfilerTool instances without
conflicting action registrations. Ultimately there should be a way to
unregister actions, or to add some extra description on which tool
instance they refer to, but this is a minimal first step.

The main problem this fixes for now is the warnings generated by the
tests.

Change-Id: I2193fc48a5a68c52f46e5567919f3035bc93df36
Reviewed-by: Tobias Hunger <tobias.hunger@qt.io>

src/plugins/qmlprofiler/qmlprofilermodelmanager.h

@@ -83,6 +83,7 @@ public:
     QmlEventFilter rangeFilter(qint64 start, qint64 end) const;
 
 signals:
+    void traceChanged();
     void typeDetailsChanged(int typeId);
     void typeDetailsFinished();
 
@@ -90,6 +91,8 @@ private:
     void detailsChanged(int typeId, const QString &newString);
     void restrictByFilter(QmlEventFilter filter);
 
+    void clearEventStorage() final;
+
     Timeline::TimelineTraceFile *createTraceFile() override;
     void replayEvents(TraceEventLoader loader, Initializer initializer, Finalizer finalizer,
                       ErrorHandler errorHandler, QFutureInterface<void> &future) const override;