Hi Mathias,
There is an option to work in "Details", "List" and "Thumbnails" modes (see attached screenshot). If you work in "List" view, then Left/Right keys acts like PgUp/PgDn. I would like them (Left/Right keys) work the same way in "Details" mode. So if I press Right key I would like the focus to move one page down (not to the end of the list).