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/Commands/RicImportEnsembleFeature.cpp

@@ -120,6 +120,8 @@ void RicImportEnsembleFeature::onActionTriggered( bool isChecked )
             RiaSummaryTools::summaryCaseMainCollection()->updateConnectedEditors();
         }
     }
+
+    RiuPlotMainWindowTools::showPlotMainWindow();
 }
 
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