Add description for changes list header checkbox #16457
Merged
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xref https://github.com/github/accessibility-audits/issues/3275
Description
Adds the tooltip description of the changed file list header/checkbox as an aria-describe by of the check all box so that it is also screen reader announced. Additionally changed the wording to "included" to match the words used in #16420 to try to better communicate that it is talking about how many files are going to be included in the commit.
Screenshots
CleanShot.2023-04-05.at.09.02.29.mp4
Release notes
Notes: [Improved] Changes list header checkbox tooltip description is announced by screen readers.