[IMP] ir_fields: no need to sanitize the _str_to_html as it is already done in the _symbol_set of html fields. This avoids doing twice the sanitization.
[FIX] _(): avoid useless warning where translating string without a cursor
[FIX] base: avoid keeping password wizards in the database longer than necessary
  
 This patch deletes the wizard lines rather than
 the wizard record itself, to avoid errors in case
 the client reloads the wizard data before actually
 closing it.