[entity/hooks] fix regression introduced by 4ba11607d84a
on create_entity, attributes weren't cached, but they are since 4ba11607d84a
and this triggered a bug: used values may be transformed by hooks (e.g.
TidyHtmlFields), ending in invalid value in the cache. This is the regression.
Now, set_attributes used to update the attributes cache while suffering from
the very same pb. This is the now fixed old bug.
Transformed attributes are now recorded in a transaction shared variable, and
those are omitted from the client cache.
<table class="attributeForm" style="width:100%;"
tal:attributes="id tab_id | nothing;
class tab_class | nothing;">
<tr tal:iter="widget lines">
<th class="labelCol" tal:content="structure python:widget.render_label(entity)">attrname</th>
<td tal:define="error python:widget.render_error(entity)" style="width:100%;"
tal:attributes="class python:error and 'error' or nothing">
<div tal:replace="structure error">error message if any</div>
<div tal:replace="structure python:widget.edit_render(entity)" >widget (input, textarea, etc.)</div>
<div tal:replace="structure python:widget.render_help(entity)">format help if any</div>
</td>
</tr>
</table>