PageEditor increased accessibility for resize/menu icon
+ hide resize if missing CSSSize plugin
Merge branch 'master' of github.com:Heigvd/Wegas

# By Anthony Geiser
# Via Anthony Geiser
* 'master' of github.com:Heigvd/Wegas:
  Add remove button for transitions Fix save function (without button)
page editor : Change resize icon -> resize node
Box initialy created with grey background
Page editor cleanout
Possibility to add State or DialogueState (from available states)
Fix position of entity when a state is added
Resize ScrollView when zooming
Merge branch 'master' of github.com:Heigvd/Wegas

# By Anthony Geiser
# Via Anthony Geiser
* 'master' of github.com:Heigvd/Wegas:
  Resize ScrollView when zooming
  Possibility to add State or DialogueState (from available states) Fix position of entity when a state is added