Integration master

Hi,

some more fixes for click_on_letter:

- pass items in QtObject container: did this finally by moving all relevant QML objects into the background component, did not find an other way to create property aliases in the QtObject container

- added levels-fr.json as POC for non-ASCII-only character sets. Though, there seem to be no corresponding alphabet/*ogg in the voices.

Thanks, regards,
  Holger