Menu - drilldown has children that accessible via keyboard focus but aren't visible

[mcoker]

re: patternfly/patternfly-react#7756

It looks like we may be able to fix this in CSS using visibility. It will:

• behave just like display: none if you set visibility: hidden as far as a11y, effectively hiding it the same way
• visibility: hidden will leave the element's size/layout in the page - in case we need that, I remember that we needed that for a height calculation?
• you can set a child of something with visibility: hidden to visibility: visible and it will show that child. something awesome that you can do that you can't with display: none
• you can transition or animate the visibility property, so adding/removing it could be part of whatever transition/animation we have that slides menus in and out

[patternfly-build]

🎉 This issue has been resolved in version 4.222.3 🎉

The release is available on:

• GitHub release
• npm package (@latest dist-tag)

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