Those tiny building status icons on HUD

[Eagle XI]

I guess they are from before implementation of building armor, since breaking an building's armor will turn the icon red. How about we tweak those icons like:

- without color tint and has a lightblue frame: building is healthy with armor is up

- tinted yellow with lightblue frame: building armor is below 50% of its maximum amount.

- tinted orange: building suffered hp damage but remaining is above 50% of its maximum health.

- tinted red: building suffered hp damage and currently is below 50% of its maximum health.