[LU] Template modifications

[NPavie]

Modification requests :

• [x] Deactivate overview of quiz
• [x] Deactivate quiz end message
• [x] Remove Score from end page of quiz
• [x] Overview start button should be on bottom right
• [x] Overview message for theory should be on the left with no title and only an image
• [x] Activity widgets section should be splitted in two widget with an image widget on the left
• [x] ResourceNode children : Serialize on active and published resources
• [x] Course and module template : add published filter