Important change: sources keep their id all lifelong.

This simplifies a lot history and testing in session.

ActionManager.h

@@ -37,8 +37,6 @@ public:
 private:
 
     void restore(uint target);
-    void replaceSourceId(uint64_t previousid, uint64_t newid);
-//    void replaceSourceId(tinyxml2::XMLElement* parentnode, uint64_t previousid, uint64_t newid);
 
     tinyxml2::XMLDocument xmlDoc_;
     uint step_;
@@ -46,4 +44,5 @@ private:
     std::atomic<bool> locked_;
 };
 
+
 #endif // ACTIONMANAGER_H