QmlProfiler: Make the progress bar somewhat nicer.

Allow adding a weight to certain tasks so that the movement of the bar
gets smoother and update the progress from more places.

Change-Id: Ifb8331dc77116cc0464b3970cd6344fbbeacec41
Reviewed-by: Kai Koehne <kai.koehne@digia.com>

src/plugins/qmlprofiler/qmlprofilermodelmanager.h

@@ -117,6 +117,7 @@ public:
 
     double progress() const;
     int registerModelProxy();
+    void setProxyCountWeight(int proxyId, int weight);
     void modelProxyCountUpdated(int proxyId, qint64 count, qint64 max);
 
     qint64 estimatedProfilingTime() const;