Improve ArmorPlateAbility draw (#9581)

* Improve ArmorPlateAbility draw

* Revert to tinting

Just make a white shine sprite. Or none-white if you want some interesting visuals with the colors.

* Fix not applying z when drawShine = false

core/assets/shaders/unitarmor.frag

@@ -2,7 +2,6 @@ uniform sampler2D u_texture;
 
 uniform float u_time;
 uniform float u_progress;
-uniform vec4 u_color;
 uniform vec2 u_uv;
 uniform vec2 u_uv2;
 uniform vec2 u_texsize;
@@ -14,8 +13,7 @@ void main(){
     vec2 coords = (v_texCoords - u_uv) / (u_uv2 - u_uv);
     vec2 v = vec2(1.0/u_texsize.x, 1.0/u_texsize.y);
 
-	vec4 c = texture2D(u_texture, v_texCoords);
-
+    vec4 c = texture2D(u_texture, v_texCoords);
     c.a *= u_progress;
     c.a *= step(abs(sin(coords.y*3.0 + u_time)), 0.9);