Added a shader to replace color of the texture

I haven't found a default shader with such behaviour, so made a very simple custom one. It acts the same way as the previous GetWhiteTexture method: sets RGB values of the set color, but leaves alpha of the original texture.

Author: SolidAlloy

Editor/ReplaceColor Shader.shader

@@ -0,0 +1,21 @@
+Shader "UI/Replace color" {
+
+Properties
+{
+   _Color ("Replace Color", Color) = (1,1,1)
+   _MainTex ("Texture", 2D) = "white"
+}
+
+SubShader
+{
+    Pass
+    {
+        SetTexture [_MainTex]
+        {
+            ConstantColor [_Color]
+            combine constant + texture, texture
+        }
+    }
+}
+
+}