The idea to clean input after submit:
in pt form view editable gadget, after submit, it will check if there has a field which
should regenerate, if yes, it will ask it's parent gadget to provide new erp5 site info,
then use it to regenerate sub field

Fix bug:
when a field's enable value is defined by TALES, it'll not be in group list

sometime web_section's type is string

Also commit the datetime field used by proxy field with the timezone
properties defined in its sub-form so that proxy field work when
using these new parameters

Integrate replicateStorage optimization

[erp5_web_renderjs_ui] allow button menus (multiple forms or buttons) in header besides single buttons

Other small fixes:
- Use simpler jquery syntax
- Prevent including the script twice (otherwise it runs the test twice)

Even though we can have different transactions between the beginning and the
end of a test, transaction.get().__hash__() might return the same value. So
always resubscribe portal_activities if it was subscribed at the beginning

Changing 'datetime' to render µs can break existing code if the column has
lower precision. For example:

> insert into t values('2015-05-26 12:18:37'); select * from t where x='2015-05-26 12:18:37';
Query OK, 1 row affected (0.00 sec)

+---------------------+
| x                   |
+---------------------+
| 2015-05-26 12:18:37 |
+---------------------+
1 row in set (0.00 sec)

> insert into t values('2015-05-26 12:18:37.2'); select * from t where x='2015-05-26 12:18:37.2';
Query OK, 1 row affected (0.00 sec)

Empty set (0.00 sec)

Another example is when searching for stricly older documents than another one.
The latter could be wrongly included in the results.

Commit e0388ecc
("catalog: render µs in SQL methods") was also incomplete:
there's still no µs support in ZSQLCatalog.

that will raise an exception with Python 2.7.10.