traffic light info window

[Andarix]

Minor changes to this window that make it a little easier to understand.

The window width should be slightly larger.
I don't know why the Setting input field is a little smaller than the others.

left new, right old

[Ranran]

Standard may be able to refer to extended code.
https://github.com/jamespetts/simutrans-extended/blob/master/gui/trafficlight_info.cc

Focus on the relevant parts, I suppose there is probably not much difference.
However, there is a difference between the expressions Yellow and Amber.

[Andarix]

other variant

[Andarix]

change object name from roadsign to object name