v0.28.36

• [NEW] upload/download file in chat
  • show icon, name of uploaded/attached file in chat before sending and can remove that attached file
  • drag and drop file to chat works (but only one file by the time)
  • a simple player for video and audio files
  • show image and animated-image (gif) in chat with small size and when clicked open popup with larger size
  • show error if exsits before upload file (server may say no, e.g to large files)