Minor CSS fixes

static/app.js

@@ -114,7 +114,7 @@ els('.card[data-room]').forEach((node) => {
     avr: node.classList.contains('avr'),
     level: el('[data-role="level"]', node),
     meter: el('[data-role="meter"]', node),
-    actions: el('[data-role="actions"]', node),
+    navigation: el('[data-role="navigation"]', node),
     toggle: el('[data-role="group"]', node),
     toggleLabel: el('[data-role="group-label"]', node),
     prev: el('[data-role="prev"]', node),
@@ -188,7 +188,7 @@ function paintTransport(room) {
   room.play.disabled = !room.available || !state;
   room.play.setAttribute(
     'aria-label', `${room.node.querySelector('h2').textContent}: ${playing ? 'pause' : 'play'}`);
-  room.actions.hidden = room.avr
+  room.navigation.hidden = room.avr
     ? !state
     : !(room.onSpotify && room.spotifyAccount && !room.grouped);
   if (room.prev) room.prev.disabled = !room.available;