Openra: Change lines color to make orders easily identifiable

[JustSomeDev1]

Request motivation

Currently, move orders are identified by a green line, while both the A-move and the attack action are represented as red lines -- it's not exactly the same red, but it's very hard do distinguish in-game.

Proposed solution

I would suggest to change attack move color to blue.

Side effects

None :smile:

Alternatives

Any other distinguishable color would work.

[abcdefg30]

I wonder if it would make sense to expose those colors to a yaml field somewhere, so users can edit them manually, or even via the settings menu.

[JustSomeDev1]

Definitely a good idea, especially if it's trivial to implement :+1:

[tovl]

Unhardcoding all the targetline colors so they could be changed per mod was on my to-do list as a follow-up to #16549, but it just was never a priority so I never came around to it.

As for alternative colors, I think gold/yellow would work pretty well. The current color scheme was a compromise so as not to overlap with the yellow for building repair, but I still think it makes more sense to give a color like blue to heal/repair actions and keep a-move in the yellow-orange range. We found pure blue to be pretty harsh/ugly though, but we can use some more subtle blueish color instead.

[dragunoff]

:+1: for exposing it to YAML. :-1: for exposing it to the user - it's just not worth it to support that and IMO it's something the user shouldn't be bothered with.