Reproducible: always
Platform-specific: no
Regression: no

Controls have a kind of issue when moving focus using Ctrl+PgUp/Ctrl+PgDown.
When last visible element is one pixel outside visible area, it gets focus when pressing Ctrl+PgDown
When first visible element is one pixel under the header, it doesn't get focus when pressing Ctrl+PgUp
Inside native applications element can't get focus in both of cases.
An ugly sample attached.

About 20 tests for lists and tables are failing because of that bug, but it doesn't break anything, so it worth only P5.