fix(a11y): announce when no matches are found in people-picker - #3180

fix(a11y): announce when no matches are found in people-picker#3180

Nickii Miaro (Mnickii) merged 12 commits into

mainmicrosoftgraph/microsoft-graph-toolkit:mainfrom

fix/bug-3117microsoftgraph/microsoft-graph-toolkit:fix/bug-3117Copy head branch name to clipboard