Implement active box using new draw item on draw layers

scwx-qt/gl/color.frag

@@ -0,0 +1,9 @@
+#version 330 core
+in vec4 color;
+
+layout (location = 0) out vec4 fragColor;
+
+void main()
+{
+   fragColor = color;
+}

scwx-qt/gl/color.vert

@@ -0,0 +1,13 @@
+#version 330 core
+layout (location = 0) in vec3 aVertex;
+layout (location = 1) in vec4 aColor;
+
+uniform mat4 uMVPMatrix;
+
+out vec4 color;
+
+void main()
+{
+   gl_Position = uMVPMatrix * vec4(aVertex, 1.0f);
+   color       = aColor;
+}