TeachingPopover: Minor style changes#30270

Mitch-At-Work merged 5 commits intomicrosoft:mastermicrosoft/fluentui:masterfrom

Mitch-At-Work:user/mitch-at-work/teaching-popover-style-touchupsMitch-At-Work/fluentui:user/mitch-at-work/teaching-popover-style-touchupsCopy head branch name to clipboard