Don't pump the volume up to 100% if it is not in a mobile device. Fix #2255

This detection method is not bullet-proof, but should work for now.

Ref: https://stackoverflow.com/a/3540295

ui/src/audioplayer/Player.js

@@ -46,9 +46,11 @@ const Player = () => {
   const [preloaded, setPreload] = useState(false)
   const [audioInstance, setAudioInstance] = useState(null)
   const isDesktop = useMediaQuery('(min-width:810px)')
-  const isMobilePlayer = useMediaQuery(
-    '(max-width: 768px) and (orientation : portrait)'
-  )
+  const isMobilePlayer =
+    /Android|webOS|iPhone|iPad|iPod|BlackBerry|IEMobile|Opera Mini/i.test(
+      navigator.userAgent
+    )
+
   const { authenticated } = useAuthState()
   const visible = authenticated && playerState.queue.length > 0
   const isRadio = playerState.current?.isRadio || false