Dropdown: Improve screenreader accessibility #1454
Pull request checklist
Description of changes
When the dropdown is selected and we navigate via screen-reader keys (capslock + right arrow), we land on the caret icon which just announces "group". This is a confusing experience for screen reader users. This pull request marks the caret icon as hidden so that it gets excluded from the screen reader.
Focus areas to test
Test steps (verified manually on Dropdown.Basic.Example):