Top Menu Tab Direction

how can i set up the direction that the top menu opens?

i am using v4 (latest version)

before the update menu tabs opened either to the left or right according to the browser size.

now they only open to the right and it is not displayed properly


Did you ever work out how to fix this because if you have sub category headings of more than 1, it lists them all vertically instead of horizontally. If the menu opened away from the nearest page border (i.e. left or right) it wouldn't be a problem and the menu would be usable