Lit overlay, make selected way more clear?

[ivanbranco]

In the lit overlay, if I select part of a way, I cannot understand how long the way I selected is, since there's no difference with the rest of the way.

An example, if I select a "green way" it's obvious what I'm editing:

if I select a "red way" it's way more difficult to understand where the way starts/ends:

I often don't reply to this quest because I don't want to undone the edits (and make the object advance by two versions creating unnecessary noise in the history of it).

[matkoniecz]

See #4417