#4941 Workaround strange file name validation in "Export FLUXNUM/MULTINUM" dialog.

Having an explicit filter for the default suffix (*.grdecl) removes the
strange complaint about the default file name not being valid.

ApplicationCode/Commands/ExportCommands/RicSaveEclipseInputVisibleCellsUi.cpp

@@ -74,6 +74,8 @@ void RicSaveEclipseInputVisibleCellsUi::defineEditorAttribute( const caf::PdmFie
         if ( myAttr )
         {
             myAttr->m_selectSaveFileName = true;
+            // Set GRDECL file filter as default
+            myAttr->m_fileSelectionFilter = "GRDECL files (*.grdecl);;All files (*.*)";
         }
     }
 }