Merge remote-tracking branch 'refs/remotes/afi/dev#12996_formation_ajout_zone_groupe_utilisateur' into afi-master

Conflicts:
	tests/application/modules/admin/controllers/CustomFieldsControllerTest.php
	tests/application/modules/admin/controllers/UserGroupControllerTest.php

admin: swap available and selected filters list

Improve filters rendering in left column

add VERSIONS

add arrows to show filter can expand / collapse

filters title show selected value

dev #12996 : fix bug on custom field -> when model is not valid , custom field post values are reloaded in form

when changing filter, edit article button works

filters rendering refacto

do not save empty custom field values

and wrap title with <[CDATA[ ]]>

fix saving of filters preferences

skin filters to look like drop down

- skin
- add "select all" value in each filter
- add "selected" class to selected filters

start styling filters

Add title and fix filtering by place

Add class "selected" to active filters

multiple filters selection works

cms calendar test refactoring

Add custom field filters rendering

Calendar add container "filters" when a filter is present