message: hide call icon in muc window
diff: }
  }
  - .jsxc-fingerprints, .jsxc-verification, .jsxc-transfer, .jsxc-video, .jsxc-sendFile {
  + .jsxc-fingerprints, .jsxc-verification, .jsxc-transfer, .jsxc-video, .jsxc-audio, .jsxc-sendFile {
  display: none;
  }
  