QmlDesigner: Count QDS startup and shutdown using telemetry

This allows tracking the number of supposed crashes.

Change-Id: I87e1c084238c5b3d556e22d25bddf8e58cdfb838
Reviewed-by: <github-actions-qt-creator@cristianadam.eu>
Reviewed-by: Tim Jenssen <tim.jenssen@qt.io>

src/plugins/qmldesigner/qmldesignerplugin.cpp

@@ -315,6 +315,7 @@ bool QmlDesignerPlugin::delayedInitialize()
         emitUsageStatistics("StandaloneMode");
         if (QmlProjectManager::QmlProject::isQtDesignStudioStartedFromQtC())
             emitUsageStatistics("QDSlaunchedFromQtC");
+         emitUsageStatistics("QDSstartupCount");
     }
 
     if (QmlProjectManager::QmlProject::isQtDesignStudio())
@@ -338,6 +339,14 @@ void QmlDesignerPlugin::extensionsInitialized()
     actionManager.polishActions();
 }
 
+ExtensionSystem::IPlugin::ShutdownFlag QmlDesignerPlugin::aboutToShutdown()
+{
+    if (QmlProjectManager::QmlProject::isQtDesignStudio())
+        emitUsageStatistics("QDSstartupCount");
+
+    return SynchronousShutdown;
+}
+
 static QStringList allUiQmlFilesforCurrentProject(const Utils::FilePath &fileName)
 {
     QStringList list;

src/plugins/qmldesigner/qmldesignerplugin.h

@@ -60,6 +60,7 @@ public:
     bool initialize(const QStringList &arguments, QString *errorMessage) final;
     bool delayedInitialize() final;
     void extensionsInitialized() final;
+    ShutdownFlag aboutToShutdown() final;
 
     static QmlDesignerPlugin *instance();