#3006 start connection
#3006 finish connection
#3006 start connection
#3006 finish connection
#3006 change function getError to getFormError cause of getError already exist
Merge branch '3006' of gitlab.lp-digital.fr:backbuilder/bbcorejs into 3006

Conflicts:
	src/tb/component/formbuilder/form/Form.js
	src/tb/component/formbuilder/form/templates/form.twig
#3006 start connection
#3006 finish connection
#3006 change function getError to getFormError cause of getError already exist
#3006 use Mediator instead of Backbone events. update test
Merge branch 'devel' of gitlab.lp-digital.fr:backbuilder/bbcorejs into 3006
Merge issue #3006