initializing forgotten attributes
Adding new class HeaderPanelWidget
Implementing HeaderPanelWidget
Replacing old central widget (maquetteWidget) by HeaderPanelWidget
Removing MaquetteWidget class
Setting attributes of the main scenario at mouse release (on HeaderPanelWidget)
Working on root box start cue
changing gradient opacity at root box selection
Ending feature
Merge branch 'refs/heads/feature/scenarioCue' into dev