Allow to change color of upgrade icon by config.

Created by: Hrusteckiy

In vanilla we have only color from a texture and it doesn't change.

I just added ability to change color by config. So, you can to use a white icon and colorize this by configs and XML. Here is an example of using this:

[prop_scope_4x]
name     = st_prop_scope_4x
icon     = ui_wp_propery_09
functor  = inventory_upgrades.property_functor_b
params   = rpm, hit_impulse
color	 = 255, 0, 255

color = 255, 0, 255