- port from Python to JavaScript (by Shirsh Zibbu),

- change from GPLv2+ to Apache-2.0 license (by Shirsh Zibbu),

- most translations lost; only {en,es,fr} are implemented, needs a
  translation team to bring forward any matching strings from the
  previous version,

- bundle inexplicably includes a generated locale/ directory,

- tested on Ubuntu 18.04 with Sugar 0.112; works fine except for save
  image button, which does nothing.

Written-by: SHIRSH ZIBBU <[email protected]>

- the button does not work now, cause unknown,

- duplicates the function of screenshot key.