Resolve "Endless scrolling on medication question modal"

Closes #1278 (closed)

update by hannu:

I adjusted the whole issue after talking to katrin. so a few more things are covered in this MR.

the whole medication modal (not just the listbox) still had the problem that you had to scroll to see the whole modal content.

i have therefore adjusted the ion modal so that it globally always has 80vh for portrait mode, then it is always sufficient and looks consistent. the other modals are now also longer, the distances on all sides to the entire viewport are also the same.

The dropdown now shows 8 rows on all screen sizes.

The second outline on focus-visible is removed.

Hovering is enabled now