Change the default file name for saving settings
Currently it is `Settings <$version_number>.pbs`. When saving the logcat or about version it is `Privacy Browser <$version_number> Logcat.txt` or similar. Originally the pattern was the file extensions like `.txt` or `.png` needed `Privacy Browser` in the file name because the extension did not specify which program it came from, whereas `.pbs` (Privacy Browser Settings) did specify the file source in the file extension. However, every time I see `Settings 3.8.1.pbs` it feels like something is missing. I think it would look more consistent if it were `Privacy Browser 3.8.1 Settings.pbs`.