Desktop mode full screen fixes for tests.

tests/iconify.c

@@ -123,6 +123,12 @@ int main(int argc, char** argv)
     if (monitor)
     {
         const GLFWvidmode* mode = glfwGetVideoMode(monitor);
+
+        glfwWindowHint(GLFW_REFRESH_RATE, mode->refreshRate);
+        glfwWindowHint(GLFW_RED_BITS, mode->redBits);
+        glfwWindowHint(GLFW_GREEN_BITS, mode->greenBits);
+        glfwWindowHint(GLFW_BLUE_BITS, mode->blueBits);
+
         width = mode->width;
         height = mode->height;
     }