Carousel's Next/Previous buttons do not stay disabled in Studio

[Nancy-Salpepi]

Test device
MacBook Air (m1 chip)

Operating System
12.0.1

Browser
Safari

Problem description
For phetsims/qa#772 in the Studio Wrapper:

If the previous button and next button are disabled, they will be enabled when the sim is launched.
This happens on both screens.

Steps to reproduce

1. In studio, navigate to the second page of the carousel on either screen
2. Disable the previous button (view.circuitElementToolbox.carousel.previousButton.enabledProperty)
3. Disable the next button (view.circuitElementToolbox.carousel.nextButton.enabledProperty)
4. Launch the sim

Visuals

[arouinfar]

Thanks @Nancy-Salpepi. I think the solution here is that carousel.nextButton.enabledProperty and carousel.previousButton.enabledProperty should be phetioReadOnly: true. However, that should be handled in a separate issue for the PhET-iO design patterns for carousel. Self-assigning to open an issue in sun.

[arouinfar]

Design issue for carousel linked above, closing.

[KatieWoe]

This has not been done in the newest dev. Reopening for phetsims/qa#774

[arouinfar]

Thanks @KatieWoe this issue will be addressed in phetsims/sun#736 where the button's enabledProperty will be made read-only.