Slightly improve the window settings example

[rmsthebest]

Objective

Update the example to avoid teaching new people that the recommended way of updating a component is to re-insert it.

Solution

Instead of inserting the component every time we want to change it, update the value.

Testing

• Did you test these changes? If so, how? Yes, ran the example
• Are there any parts that need more testing? I don't think so?
• How can other people (reviewers) test your changes? Is there anything specific they need to know? Run the example, press left and right mouse.
• If relevant, what platforms did you test these changes on, and are there any important ones you can't test? (linux/wayland)