Minor suggestion: Better icon for "show hidden items" button

[TsunamiZ]

[This is a minor improvement request, but may be interesting...]

How about use a better icon for the "show hidden items" button? I suggest using a human eye for the icon instead of H [also makes more sense for multi-languages]. Or better yet, have an opened eye icon when that button is on, and have a closed eye icon when that button is off.