add screen ratio and reuse trail element
Merge branch 'master' of https://github.com/raiseandfall/team-data-capture

* 'master' of https://github.com/raiseandfall/team-data-capture:
  Grrr typo in README
  Updated README
  Renamed scroll action from 'mousewheel' to 'scroll'
  Removed unused logs
  Added 'toggle recording scroll' to menubar
  App now tracks scroll action: added to socket messages