[FIX] res.groups: when generating initial group view, use admin context and language

This means group category names can be translated in the
default/installation database language.

Closes #3921

openerp/addons/base/res/res_users.py

@@ -705,6 +705,10 @@ class groups_view(osv.osv):
     def update_user_groups_view(self, cr, uid, context=None):
         # the view with id 'base.user_groups_view' inherits the user form view,
         # and introduces the reified group fields
+        if not context or context.get('install_mode'):
+            # use installation/admin language for translatable names in the view
+            context = dict(context or {})
+            context.update(self.pool['res.users'].context_get(cr, uid))
         view = self.get_user_groups_view(cr, uid, context)
         if view:
             xml1, xml2 = [], []