Changes in 1.7.1

• filechooser: Handle the "directory" option to select directories
• filechooser: Only show preview when we have an image
• Translation updates

$ sha256sum xdg-desktop-portal-gtk-1.7.1.tar.xz 
b6f6d28451e89488dc1121be9355f06686546f869b8d1a2d607c2f63bbd8bb5e  xdg-desktop-portal-gtk-1.7.1.tar.xz