Merge branch 'master' of https://github.com/thelia/thelia

# By Manuel Raynaud (55) and others
# Via gmorel (9) and others
* 'master' of https://github.com/thelia/thelia: (98 commits)
  fix folder creation route
  add compass to assteic filters
  ifix asseticHelper sass filter
  create purchase order pdf
  complete invoice pdf template
  implement pdf invoice generation workflow
  start pdf generation workflow
  fix order dropdown menu
  fix reorder position on folder and category removal
  reorder position on folder and category tables before delete action
  test annd and remove folder content association
  test update content position with specific position number
  test content update position up and down
  test content toggleVisibility
  create test for content removal
  test update content
  test content creation process
  test folder UpdatePosition with specific position
  test updating up and down folder position
  test folder toggle visibility
  ...