Feature: Move head to mouse position.

See #176.
TODO:
- [x] write a draft code
- [ ] Get my pull-request into the LAOS firmware (https://github.com/LaosLaser/Firmware/pull/10)
- [x] Find a reasonable resolution: using the highest available
- [ ] Internationalization (https://github.com/t-oster/VisiCut/compare/develop...feature-move-head-position#diff-dd385dda36b213a0d089058e49e332cbR115)
- [ ] Improve the UI
- [ ] Move the code to LibLaserCut for interactive lasercutter-features instead of sending an empty job (add support for jogging, interactive lasercutter controls etc.)