Reuse the one provided by erp5_xhtml_style

Only CKEditor and CodeMirror are still supported.
This will ensure the compatibility between erp5_xhtml_style and erp5_web_renderjs_ui.

This will improve the compatibility for all existing editorfield which will be migrated to gadgetfield (via proxy).

This allows to propagate more options to the render parameters, used in erp5_xhtml_style and erp5_web_renderjs_ui

But chrome is now unhappy...

GadgetField doesn't know how to validate/store REQUEST form data.
Use an external field to handle this task.
The external field must be located in the same form, and can be put in the hidden group if not rendered.

Add a test with a stringfield and a textarea field as validator.

Make ckeditor responsive.
Disable ACF.

Notify on changes.
Allow to save with Ctrl+S
Add a ruler
Disable Crtl+R

Thanks to Tristan Cavelier for his original work.

Listbox can embed rjs gadget

It is no longer maintained.
Switch to ck_editor instead.

ung has been replaced by officejs.

This editor has been deprecated and is not supported anymore.

This bt5 provides required portal types (Web Style, ...)

This reverts commit 8076005e.

Web Illustration is already provided by another bt5.

This business template contains all the objects needed to bootstrap an ERP5 instance in order to prepare it for scalability tests:
- A business configuration object (generated after standard configurator installation)
- A bootstrap script (pending)
- A script that generates a specific amount of users (person-assignment-login per each)