This reverts commit 35b2c024.

Allow edition in the new UI

This make everything slow as hell and prevent to quickly save.

Example: <h2 class="foo">bar</h2> => <h3 class="foo">bar</h3>

Changing the language and browsing to another web section require to fully refresh the page.

This breaks the previous gadget API.

erp5_web_renderjs_ui: Change date separator from a dash to a slash before sending query to Zope. If date separator was a dash, Zope DateTime does not use local timezone and date search does not work.

Previously available at https://nexedi.erp5.net/web_page_module/3487.

So that it can be registered properly on load and later added through the ZMI.

ZODB Components: Tool Component: Only validated 'reference' must be considered when registering a Tool.

Otherwise setting an invalid reference will make the Component 'modified' but
try to use that invalid reference to register it and fail.

With chrome ( 85.0.4183.108 but I think it appears a few weeks/months ago )
when using erp5_xhtml_style when the cursor in the first column on the left
it's not visible, because the bold background hides it.

Default user agent spreadsheet is a 2px padding, but we have a rule applying a
padding 0 for all textarea. Revert this rule for textarea used as fields in
content.


---

## before:

The cursor is in *Description* field, left to "This style is ..." but cannot be seen.

![image](/uploads/f40262af196d799291643604b91ae2c4/image.png)


## after:

The cursor is same location (*Description* field, left to "This style is ...") and this time is visible.

![image](/uploads/bf1ec63532e2eca1fca7655a4581935a/image.png)

See merge request nexedi/erp5!1280

See merge request nexedi/erp5!1282

Previously this would be rendered as empty String
(unless we had a hidden field to define precision)

Commit adds also testListboxZeroValue in  erp5_web_renderjs_ui_test

See merge request nexedi/erp5!1173

See merge request nexedi/erp5!1262