Problem with buttons of Save Dialog window on non English Ubuntu

[Godrigos]

Describe the bug:

The save file dialog show me the expected buttons (Home, Documents, Downloads, Computer). But, the Documents when clicked cause these errors:

2020/08/12 08:14:19 Fyne error: Unable to read path /home/rodrigo/Documents 2020/08/12 08:14:19 Cause: open /home/rodrigo/Documents: no such file or directory 2020/08/12 08:14:19 At: /home/rodrigo/go/pkg/mod/fyne.io/fyne@v1.3.3/dialog/file.go:183

The cause, I believe, is that my PC uses another language than English (Brazilian Portuguese), and my folder is called Documentos.
Downloads and Home folders are not translated, so unaffected. Computer points to /, also unaffected.

To Reproduce:

Steps to reproduce the behavior:

1. Run the app on a non English Ubuntu PC (where Documents folder has its name translated)
2. Save a file using the save dialog window
3. Click the Documents button.
4. See an empty folder and the error above on terminal.

Device:

• OS: Ubuntu
• Version: 20.04
• Go version: 1.14.7
• Fyne version: 1.3.3

P.s.: On Windows 10 I've noticed that if Downloads folder has its path changed, the Downloads button also fails to reach the new location determined within the folder properties (It may happen to other system folders with altered paths). But I can't give more details, I rarely use Windows...

[andydotxyz]

On develop for testing