Line table icons for each mode

[omegamezle]

I've created icons for each mode of transport in-game and made some script changes so they're used. I have tested this for each mode and it does work as you'd expect.

There's also an "alt" texture I've made in for the "in_station_many" icons which could be used to indicate that there are several vehicles behind one in a terminal, as that is currently not a feature for the table, but one I personally don't trust myself to script in with the knowledge I have.

I have also redone the tram icon, but this is mainly due to the fact it didn't scale particularly well.

[omegamezle]

It may be worth not replacing "TimetableTramIcon@2x.tga" as it does make it inconsistent with the in-game UI. I'm going to take another shot at scaling the original icon down quickly.

[omegamezle]

Ah, I guess the original looks alright scaled down afterall. I'll get this sorted and pushed

[omegamezle]

That's more like it

[omegamezle]

Should be done now 😅