QmlProfiler: Make progress widget more expressive

Instead of the progress bar we can now show the number of events we
have received, and the number of finished finalizers. This should give
a the user a better idea of what is going on.

Change-Id: I324fefbe6d5e3c24b080bfbc103c4317fa585215
Reviewed-by: Joerg Bornemann <joerg.bornemann@qt.io>

src/plugins/qmlprofiler/qmlprofilermodelmanager.h

@@ -99,10 +99,14 @@ public:
     QmlProfilerNotesModel *notesModel() const;
 
     bool isEmpty() const;
+    uint numLoadedEvents() const;
 
     int registerModelProxy();
     void announceFeatures(quint64 features, EventLoader eventLoader, Finalizer finalizer);
 
+    int numFinishedFinalizers() const;
+    int numRegisteredFinalizers() const;
+
     void dispatch(const QmlEvent &event, const QmlEventType &type);
 
     quint64 availableFeatures() const;