Analyzer: Only load a random first tool if none is selected already

Change-Id: Ia0ece94a8ef8d8f86d08400594744552c7a77242
Reviewed-by: Tarja Sundqvist <tarja.sundqvist@theqtcompany.com>
Reviewed-by: hjk <hjk@theqtcompany.com>

src/plugins/analyzerbase/analyzermanager.cpp

@@ -432,7 +432,7 @@ void AnalyzerManagerPrivate::modeChanged(IMode *mode)
 {
     if (mode && mode == m_mode) {
         m_mainWindow->setDockActionsVisible(true);
-        static bool firstTime = true;
+        static bool firstTime = !m_currentAction;
         if (firstTime)
             selectSavedTool();
         firstTime = false;