Needs to be tested with: Language directions: RTL; and LTR Themes: Clean; Another bootstrapbase; Standard; and Another standard-based theme Create a course with many gradebook items (I use a Medium test course) View the gradebook Confirm that the list of user names is visible Move horizontally along the gradebook so that the floating header appears Confirm that the list of user names is always hard against the screen edge Dock some blocks, leaving at least one undocked Move to the left (or right in RTL) edge of the page Confirm that the list of user names is entirely visible Scroll to the side again Confirm that the list of user names is entirely visible Confirm that the list of user names has some padding for the dock Dock any remaining blocks Move to the left (or right in RTL) edge of the page Confirm that the list of user names is entirely visible Scroll to the side again Confirm that the list of user names is entirely visible Confirm that the list of user names has some padding for the dock