This does not work well with erp5_accounting_alternate_catalog.
It is left for draft transactions, because draft may not have any section set.

For the records, the idea behind is to prevent an unexpected behaviour when a
user have a section_category in his selection and calls a worklist which is
also supposed to display transactions which are not part of the selected
section_category. In such case, section_category= is passed to reset the
selected section_category and display all transactions, the problem is that
alternate catalog is not able to decide wether to display source or destination
section in that case

Refactor code and use proper names.

same as 4c129961.

Complete rewrite of the syncml core engine to make it scallable
Remaining work :
- review of conflict management
- re-implement splitting of big object
- generic unit test for AsynchronousEngine
- complete review of default conduit
- lot of TODO and XXX in the code to check

Now title needs to be configured as a content translation translated property
to be able to search on title.

I doubt anyone wants to fill full_text table with this information.

It's no longer needed to configure using the script

-Titlecase terms, uppercase abbreviations, avoid jargons, add titles to empty title forms....

* it is faster.
* it does not require Products.

Allow client side to specify how it want server to return listbox field - i.e. it can be rendered locally or rendered entirely server side.

Fixes copy-paste of DateTimeField rendering into search expression, as it
separates time from date with 3 spaces.

Original code behaviour:
>>> def foo(self, a=None):
...    return 'works'
...
>>> context.foo(a=1)
works
>>> def foo(self, a):
...   return 'works'
...
>>> context.foo(1)
works
>>> context.foo(a=1)
TypeError: foo() takes exactly 2 non-keyword arguments (0 given)

New behaviour fixes this TypeError, to be closer to normal python
behaviour.
Also, original code was doing expensive checks before cheap ones.