absolute Layout plugs CSSSize

+ plug CSSSize plugin to children
* Editor name rename to "Layout"
+ Deprecated Plugin Position
Fullscreen icon
Treeview state save/restore

+ save state (collapsed)
+ restore state from a previously saved state
Pagetreeview with sortable

+ added sortable widgets
*JSLint corrections
Merge branch 'master' of github.com:Heigvd/Wegas

# By Anthony Geiser
# Via Anthony Geiser
* 'master' of github.com:Heigvd/Wegas:
  Add teaching game (activité - pédagogie)