Brings improvements

Balance
- No more empty weight
- Left weight should not go to right scale
- Reducing the size of half

Morpion
- Correction de l'évaluation des lignes

Train
- Add <1 and <0.1 options
Signed-off-by: Didier Bathily <didier.bathily@njin.fr>

Navigation palette: thumbnails isn't refeshed after application added to the page

Conflicts:
	src/board/UBBoardController.cpp
	src/domain/UBGraphicsStrokesGroup.cpp

Changing the languages of the virtual keyboard crashes the software

Changing the languages of the virtual keyboard crashes the software

The annotations are erased when you select the Erase items

shutdown after emptying the trashbin