Ways should have slight hover effect

[mvl22]

When Ways are shown, sometimes it is not obvious that a single line is actually two or more Ways. Many times I've done an edit to a Way that I've found using Overpass Turbo, and then realised there was a short section at one end missed out.

So it would be useful if hovering over a Way should have a slight hover effect.

Given that colour styling can be added, it would be best to implement this by adding a slight amount of opacity, e.g. (in pseudo-code):

way:hover {opacity: 0.8;}