closing feature #3374
adding a way to display copy options
adding method copyThumbnail to ThumbnailController.java
Merge branch 'master' into ney-feature3374
with feature #3374, took the opportunity to refactor some stuff to facilitate the move of form content (mainly wysiwyg field) and thumbnail.
Thereby code moved to the service layers and it is more reusable.
Merge branch 'master' into ney-feature3374