fix: set flyout visbility on calling setExpanded

[itsjayway]

The basics

• I branched from develop
• My pull request is against develop
• My code follows the style guide
• I ran npm run format and npm run lint

The details

Resolves

Fixes #7174

Proposed Changes

call setVisible(isExpanded) on the parentToolbox_'s flyout to update visibility

Behavior Before Change

flyout is not closed when setExpanded(false) is called on collapsible_category, contrary to expected behavior

2023-06-23.01-51-08.mp4

Behavior After Change

flyout is hidden along with collapsed category

2023-06-23.01-44-01.mp4

Reason for Changes

fulfilling expected behavior in every case

Test Coverage

tested full functionality of expand/collapse by opening, switching, and unfocus clicking the flyout/collapsible regions before and after changes

Documentation

updated setExpanded` docstring

[itsjayway]

please let me know of any redundancies that may arise with setting the flyout's display attribute. I'm going to double check on my end as well. thank you in advance!

[BeksOmega]

Thank you for the fix! This is looking good :D Just one change and then this should be good to go!