As discussed with VDG, color the scrollbar with the same colors as the terminal color scheme itself. It looks way cleaner and modern

The scroll bar now looks different from all other scroll bars in KDE (as far as I can see), because they use the system-wide color setting.

Whether something is cleaner or modern is obviously subjective. I understand the appeal of this decision, but I can't bring myself to like it. Since there is no clear separation of text and scroll bar, I can't see where a line ends. This results in lines being broken although it looks like there is still space left. GNOME's terminal is different here, because the scroll bar is on top of the text, not next to it. That makes complete sense! But now lines end in the middle of nowhere.

I'm not saying it is wrong, but maybe other people want a more consistent style. If we want to introduce an inconsistency with the rest of KDE here, we should at least make it a setting.

If the VDG decision is to let scroll bars blend in with the content, then they should be above the content as in GNOME.