I looked in other panels in System Settings and I could not find any which showed a visual distinction between focused and unfocused states in tree views (or scrolled windows). I found that empty tree views (ones that display no data) show a whole-view selection when focused, but I could not reproduce this with non-empty tree views. As far as I am aware, the UOA control center panel does not override any theme settings relating to focus borders.
Matthew, do you have any examples of the focus ring that you want to achieve?
I looked in other panels in System Settings and I could not find any which showed a visual distinction between focused and unfocused states in tree views (or scrolled windows). I found that empty tree views (ones that display no data) show a whole-view selection when focused, but I could not reproduce this with non-empty tree views. As far as I am aware, the UOA control center panel does not override any theme settings relating to focus borders.
Matthew, do you have any examples of the focus ring that you want to achieve?