clean up active device selection

when clicking first column

src/device.js

@@ -343,7 +343,6 @@ function heartbeat() {
       d.sendQueue.shift();
     }
   });
-  document.getElementById('network-indicator-dot').style.background = '#111';
 }
 setInterval(heartbeat, 50);
 

src/view.js

@@ -162,6 +162,10 @@ function switchDevice(id) {
   if (id === undefined) {
     document.getElementById('refresh-device-button').disabled = true;
     document.getElementById('device-settings-table').style.display = 'none';
+    const $activeDevice = document.querySelector('.active-device');
+    if ($activeDevice) {
+      $activeDevice.classList.remove('active-device');
+    }
     return;
   }