Setlist OpenLP Export in Chrome doesn't work #227

Describe the bug
OpenLP export of a setlist in Chrome (or maybe more webkit based browsers?) doesn't work as expected on some (!) machines. The exported setlist won't have song translations.

To Reproduce
Steps to reproduce the behavior:

1. Open Chrome and open a setlist having songs with translations in SongDrive
2. Click on Export > OpenLP setlist (osz)
3. Open the exported file in OpenLP (works fine so far)
4. See that there are no song translations

Expected behavior
Songs existing in other languages should be included in setlist exports in all browsers.

Desktop (please complete the following information):

• OS: Windows 10
• Browser Chrome
• Version tba

Additional context
Firefox works fine.