Several adjustments user interface and project file

* Avoid writing error message if observed data for a well is not present
* Add missing log text during replace summary ensemble
* Make sure plot window is visible after importing summary ensemble
* Add observed FMU folder to path section
* Move worker functions to RiaProjectFileTools
* Reset numbering of path IDs when saving project.
* Remove warning when fault name is longer than 8 characters

ApplicationLibCode/ProjectDataModel/RimObservedFmuRftData.h

@@ -40,9 +40,13 @@ public:
     std::vector<QString> wells() const;
     std::vector<QString> labels( const RifEclipseRftAddress& rftAddress );
 
+protected:
+    void initAfterRead() override;
+
 private:
     cvf::ref<RifReaderFmuRft> m_fmuRftReader;
 
-    caf::PdmField<QString>                        m_directoryPath;
+    caf::PdmField<caf::FilePath>                  m_directoryPath;
+    caf::PdmField<QString>                        m_directoryPath_OBSOLETE;
     caf::PdmProxyValueField<std::vector<QString>> m_wells;
 };