fixed bug with cutting text on setup screens without scrollbar

fixed bug with cutting text on setup screens without scrollbar

When drawing selection lists on setup sub-screens, text was always cut
on the right side to prevent drawing text over a potential scrollbar,
even if the selection list is short enough that there is no scrollbar.

Now it is checked if the setup sub-screens has a scrollbar or not, and
the right edge where text has to be cut is calculated accordingly.