The "content" field (number & size) of a directory's "Properties" does not include hidden files or folders in the total count.

I tested the bug with the following contents :

1) 'test' directory with 1 file + 1 hidden file
'test' folder "properties" show : 1 element, size 4,6 Mo
Removing the 'dot' in the 2d file's name achieves what the total amount should be : 2 elements, size 11,6 Mo

2) 'test' directory with 1 file + 1 (visible) subdirectory including 1 hidden file :
'test' folder properties show : 2 elements, size 4,7 Mo

3) 'test' directory with 1 file + 1 hidden subdirectory including 1 visible file :
1 element, 4,6 Mo
where it should be : 3 elements, 10,4 Mo

The bug happens whether or not "show hidden files" is configured active.

I flagged the bug as "major" because it is a potential cause of serious mistakes when :
- checking the size of a directory before copying it elsewhere,
- deleting a directory forgetting it was containing files markes ad hidden for some reason.