Fix report generation with a standard (non administrator) user on Windows

The bug is reproducible under MS Windows 7 Pro

Steps to reproduce:

1. Install Nuxeo-Drive 2.4.4 on MS Windows with an Windows Administrator account
2. Run Nuxeo Drive application as normal Windows user
3. Login to Nuxeo Drive
4. Wait for sync completion
5. Go to Advanced tab and click on the link generating a bug report

Result: Generated report location is not shown and debug.log is not generated under reports zip folder