Bug 16589 - Quote of the day: Fix upload with csv files associated to LibreOffice...

Bug 16589 - Quote of the day: Fix upload with csv files associated to LibreOffice Calc

To reproduce:
- Install LibreOffice and make sure that csv files are associated to Calc
  (Note: tested with Firefox 46.0.1 on Windows 8)
- Go to Home > Tools > Quote editor > Quote uploader
- Try to upload a valid CSV (e.g. Example from Bug 15684)
Result: File can not be uploaded
        (Incorrect filetype: application/vnd.sun.xml.calc)
To test:
- Apply patch
- Try to upload again
Expected result: Quotes are imported.

Signed-off-by: Frédéric Demians <f.demians@tamil.fr>
  Can't reproduce on a Mac but get it fails on a Windows Box: fixed with this
  patch.

Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>
Can't recreate on debian but the fix looks safe.

Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>