Add screen reader label to toggle button
Add screen reader label to toggle button

nblair/uw-ui-toolkit,timlevett/uw-ui-toolkit,UWMadisonUcomm/uw-ui-toolkit,smargovsky/uw-ui-toolkit,UWMadisonUcomm/uw-ui-toolkit,nblair/uw-ui-toolkit,UWMadisonUcomm/uw-ui-toolkit,timlevett/uw-ui-toolkit,nblair/uw-ui-toolkit,smargovsky/uw-ui-toolkit,smargovsky/uw-ui-toolkit,smargovsky/uw-ui-toolkit,nblair/uw-ui-toolkit,UWMadisonUcomm/uw-ui-toolkit,timlevett/uw-ui-toolkit,timlevett/uw-ui-toolkit