Add restore icon
Added formatted labels and tooltip to statemachine viewer
Fix #767 Les tooltip sont mal positionnés
Force utf-8 for game models export and add Content-Disposition response header to force download
Merge branch 'HEAD' of https://github.com/Heigvd/Wegas.git

Conflicts:
	wegas-app/src/main/webapp/wegas-editor/js/widget/wegas-statemachineviewer.js