Problem description: When a document was developed in the open file format ".ODS", none of the charts or its elements are seved if the document is then saved as Microsoft Office 2007 and later file format ".XLSX". In other words, if you issue a "Save as..." command and save in .XLSX file format, you have to redo all the charts from scratch.

Steps to reproduce:
1. Open LibreOffice Calc
2. Input random data
3. Make a chart from it
4. Save the file in the default file format ".ODS"
5. Close it.
6. Reopen the file
7. File-> Save as... and choose the ".XLSX" file format
8. Press "Save"
9. Close the new file
10. Reopen and see that the chart is gone

Current behavior: Explained above

Expected behavior: The chart and its elements should be easily transferable to a ".XLSX" file format, because sometimes it is the only way to send a spreadsheet to someone not tech-savvy enough to know or care about alternatives to Microsoft Office Excel.

              
Operating System: Windows 7
Version: 4.1.0.4 release