Site Editor: prevent navigation panel focus when hidden #29600
Merged
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Description
Removes the site editor navigation panel from the accessibility tree when hidden, so it can't receive keyboard focus.
Also removes an unneeded border from the toggle button to improve the slide animation.
Fixes #29536
How has this been tested?
Using the keyboard to navigate through the site editor header.
Screenshots
Keyboard navigation in header menu
Remove bottom border from navigation toggle when closing panel
Types of changes
Non-breaking change
Checklist:
I've included developer documentation if appropriate.(n/a)I've updated all React Native files affected by any refactorings/renamings in this PR.(n/a)