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.cpp

@@ -202,6 +202,12 @@ void QmlProfilerModelManager::replayQmlEvents(QmlEventLoader loader,
     }
 }
 
+void QmlProfilerModelManager::clearEventStorage()
+{
+    TimelineTraceManager::clearEventStorage();
+    emit traceChanged();
+}
+
 static QString getDisplayName(const QmlEventType &event)
 {
     if (event.location().filename().isEmpty()) {
@@ -255,6 +261,7 @@ void QmlProfilerModelManager::finalize()
     // which happens on stateChanged(Done).
 
     TimelineTraceManager::finalize();
+    emit traceChanged();
 }
 
 void QmlProfilerModelManager::populateFileFinder(const ProjectExplorer::Target *target)