make auto completion path short

[AlexHolly]

#4704

Still not a good solution I think there is a horizontal scoll missing.

[akien-mga]

I agree about the need to enhance this, but I'm not convinced by the proposed fix, I don't find it readable with all path parts cut in 3 with the middle part replaced by a simple dot.

It would be better to cut in the middle of the whole path with three dots, as proposed in #4704 originally.
Or yes, even better would be to have horizontal scrolling of the hovered line to avoid having to cut it.

Or actually both: ellipsis when not hovered (so that it fits in the dialog), and when hovered the ellipsis is removed and the full path scrolls instead. So adding only the ellipsis for now would be a first step.

[akien-mga]

As per the above, I'm not convinced by this proposal, so closing.