Migrate from JonController to AjaxController

cubicweb_fresh/views/__init__.py

 """template-specific forms/views/actions/components"""
-from logilab.common.decorators import monkeypatch
-
 from cubicweb.web import formwidgets as fw
-from cubicweb.web.views import uicfg, basecontrollers
+from cubicweb.web.views import uicfg
+from cubicweb.web.views.ajaxcontroller import ajaxfunc
 
 _afs = uicfg.autoform_section
 _affk = uicfg.autoform_field_kwargs
@@ -14,8 +13,7 @@ _affk.tag_subject_of(('Expense', 'spent_for', '*'),
                          autocomplete_settings={'limit': 100, 'delay': 300})})
 
 
-@monkeypatch(basecontrollers.JSonController)
-@basecontrollers.jsonize
+@ajaxfunc(output_type='json')
 def js_get_concerned_by(self):
     term = self._cw.form['q']
     limit = self._cw.form.get('limit', 50)