Added "who is typing" feature for both rooms and conversations with the admin option to enable it for each individually. The list of users who are typing is loaded directly from JSON files on the server so performance should be good with this approach. Server side, the file is read using file_get_contents and it requires allow_url_fopen on your server. This feature only works when the page is focused to prevent unnecessary loads.
Made some changes in room embed mode to only display room messages and user list from the room with no other tabs, improving db queries as well.
