NXP-11054: improve / cleanup existing BulkEditActions, add fancybox include
for bulk edition.

Update 'fancybox_after_action_template.xhtml' tempalte to compute the content
height so that the overflow is done on the content div without the title
and actions.
NXP-11227: make i18n the dnd error messages
NXP-11059: add a 'saveBox' widget
Merge branch 'feature-NXP-11054-bulk-edit'