This is essential to have better aesthetic of Deepdiff diff for tuples.
In general, we treat iterables as long string so as to bypass the complicated
diff for iterables provided by DeepDiff, but for tuples this was creating a
problem as it was not possible to understand the diff properly.

Hence, by soting them, we get more understandable diff for tuples.

Also, there is no need to override `__diff_tuple` function as it is itself
dependent on `__diff_iterable` which we already override.

Following convention, it makes more sense to use view mode for DiffTool view.
Also, we don't need selection as of now.

Also, update the tests

View wise, the date and path for new version/obvject should be on right side which
in our case is `your_second_date`. Thus, the case where we run diff action on single
object, the right side should show the current version and the left side shoule show
the last version.

/reviewed-on nexedi/erp5!741

/reviewed-on nexedi/erp5!748

/reviewed-on nexedi/erp5!739

/reviewed-on nexedi/erp5!740

zope.conf default encoding is also used for responses and converters, so
for consistency we should also force default encoding there.
This is especially useful when running tests, because zope.conf is not
used and default values are used.

https://tools.ietf.org/html/rfc4329#section-7 states that text/javascript is obsolete.

Doesn't really matter in the end because WebPage_viewAsWeb forces the content type.

In HTTP/1.1 , when not specified , charset detault to ISO-8859-1

https://tools.ietf.org/html/rfc2616#section-3.7.1

> media subtypes of the "text"  type are defined to have a default charset value of "ISO-8859-1" when   received via HTTP

Zope adds a charset with default encoding (
https://github.com/zopefoundation/Zope/blob/2.13/src/ZPublisher/HTTPResponse.py#L512-L515 ) but does this only for text/ type, but we serve our javascript as application/javascript

Correctly handle multiple interface declarations

Reduce DOM modification.

Load gadget in an iframe to improve isolation

Delay gadget creation to prevent creating hundred of iframes in parallel, which slow down the browser

Prevent submitting the form if the relation field contains an unknown search string.

_reindexOnCreation API does not expect an expanded activate_kw, but
really only an expanded reindex_kw - which may contain its own
activate_kw, over which our activate_kw is supposed to take precedence
(see Products.ERP5Type.Base.Base._getReindexAndActivateParameterDict).
It's all so easy !

activate_kw was not honored in immediate indexation code path.

Also, tix typo in comment.

Revert "Folder: call activate on the object instead of portal_activities.activateObject in _recurseCallMethod()."

This reverts commits 3d3ec3cb ((+ fixup), which
broke recursion to objects that don't inherit ActiveObject, as explained in the
docstring.

I also think it was wrong in that default activate parameters disappear at the
end of the transaction whereas _recurseCallMethod may activate itself to avoid
creating to many activities at once. IOW, it's important that created
activities are the same no matter where _recurseCallMethod splits the browsing.

This change needed more review, as well as a unit test.

Folder: call activate on the object instead of portal_activities.activateObject in _recurseCallMethod().

so that activate_kw set on the object is respected.

The site shall be used with default BT5s.

Previous field names came from obsoleted erp5_core_proxy_field_legacy

This was the case before
  commit b41dc8e0
  Author: Vincent Pelletier <vincent@nexedi.com>
  Date:   Wed Sep 12 04:00:08 2018 +0200

      SQLCatalog_deferFullTextIndex{,Activity}: Use serialization_tag .
but I misread the code: when this exception triggered, document was neither
added in parameter_dict nor in failed_path_list. It should be now clearer.