a11y: improve tree filtering keyboard navigation and announcement #8968
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Description
This fixes the following issues:
The former issue is fixed by preserving the search query in case the query is not empty. If the query is empty blur causes the filter to close. I'd like to note that the filtered state is preserved until a user explicitly clears the search query. To me, this should be the desired behavior.
The later issue has more to note about:
Announced
component from FluentUI built-ins. Tested with NVDA and it works.aria-labeledby
link to the announced text, so it can be announced using Narrator shortcuts while navigating through the searchbox or the tree itself.Task Item
Screenshots
#minor