Multiple fixes

- Fixed pwa location in manifest.json
- made database generator check the .env for location rather than runtime attribute
- fixed dark mode preference based on cookie/browser preference
- changed to socketio.sleep for compatibility

Server/webbyBits.py

@@ -137,7 +137,7 @@ def playQueuedSongs():
         # check for new songs every second
         # I just didn't want to eat too much processing looping 
         # this also has another useful affect that skips get "queued" to only 1 per second, that way somebody usually can't skip twice accidentally
-        time.sleep(1)
+        socketio.sleep(1)
 
 @socketio.on("connect")
 def handleConnect():