[BUG] Non-latin characters in path names are not handled correctly

[neffo]

NOTE:
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Describe the bug
delacosta78's report for "Bing Wallpaper":
Hello, I found a bug, when changing the folder where the images are saved and that folder has a tilde in the word (for example Imágenes) the extension is not detecting that properly and it's creating a separate folder in the home folder like this:

/home/myusername/Im%C3%A1genes/BingWallpaper

As you can see the extension is creating the "Im%C3%A1genes" folder instead of using the folder I want to use with the name "Imágenes" with a tilde in the letter a.

Screenshots
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To Reproduce
Steps to reproduce the behavior:

1. Go to '...'
2. Click on '....'
3. Scroll down to '....'
4. See error

Desktop (please complete the following information):

• OS: [e.g. Ubuntu 21.04]
• Extension Version: [e.g. 36]
• GNOME Version: [e.g. 40.0]

Additional context
Add any other context about the problem here.

[neffo]

should be fixed by #170

Issue was related to mistaken use of Filechooser get_uri() when get_path() should have been used.