Give breadcrumbs toolbar an accessibility label.

src/components/views/rooms/RoomBreadcrumbs.tsx

@@ -111,7 +111,7 @@ export default class RoomBreadcrumbs extends React.PureComponent<IProps, IState>
                     appear={true} in={this.state.doAnimation} timeout={640}
                     classNames='mx_RoomBreadcrumbs'
                 >
-                    <Toolbar className='mx_RoomBreadcrumbs'>
+                    <Toolbar className='mx_RoomBreadcrumbs' aria-label={_t("Recently visited rooms")}>
                         {tiles.slice(this.state.skipFirst ? 1 : 0)}
                     </Toolbar>
                 </CSSTransition>

src/i18n/strings/en_EN.json

@@ -1465,6 +1465,7 @@
     "Seen by %(displayName)s (%(userName)s) at %(dateTime)s": "Seen by %(displayName)s (%(userName)s) at %(dateTime)s",
     "Replying": "Replying",
     "Room %(name)s": "Room %(name)s",
+    "Recently visited rooms": "Recently visited rooms",
     "No recently visited rooms": "No recently visited rooms",
     "No rooms to show": "No rooms to show",
     "Unnamed room": "Unnamed room",