wizard: implement new wizard details

This changes many things:
+ Except the backup page, all pages were re-designed
+ Heavily modify buttons and line edits with new components style
+ Update switches themes
+ Re-work username
+ Add future components
+ Update strings
+ Update PhotoBoothView

GitLab: #769
GitLab: #770
GitLab: #766
Change-Id: Ic97d36cf8c86c4242013bf71a524887f7ce56f8f