Dev#12992 Custom Fields

Fix test

add edit link to session formation

add link to formations

doc in VERSIONS

Fix PHP5.4 incompatibility

Conflicts:
	VERSIONS
	cosmogramme/php/_init.php

Values form: back button goes to instance edit action

Do not display custom fields link in user group if no fields defined

When saving values, notify successful save

When a custom field definition is deleted, values are deleted too

if no custom field defined, display error message when editing field values

automatically create missing values

Merge branch 'dev#12992_custom_fields' of git.afi-sa.fr:afi/opacce into origin-dev#12992_custom_fields

# Veuillez entrer un message de validation pour expliquer en quoi cette fusion est
# nécessaire, surtout si cela fusionne une branche amont mise à jour dans une branche de sujet.
#
# Les lignes commençant par '#' seront ignorées, et un message vide
# abandonne la validation.

fix patch 200 which fail on duplicate key

Force upgrade db for gitlab

Fix failing tests

Add values persistency and form populate

options set in a select custom fields are now usable

fix toggle visibility of select in meta form + adding missing files

Usergroups have link to custom fields form

models registration moved from Meta to Models

create generic values action for article and usergroup

ordering of fields now works correctly

Conflicts:
	cosmogramme/php/_init.php

dev #12992 upgrade table custom-field-meta with options_list + upgrade controller definitionList form

add controller and screens for meta custom fields

add edit / delete links
on back button right group is correctly open

add model association in form

dev #14482 implementation of treeView on custom-fields controller Index + starting implementation of custom-fields/add action