erp5_web_renderjs_ui: keep previous focus color

This reverts commit a87db49b.

Change max age to 1 hour and 1 day

It is GPDR compliant, as no cookie is set

Use CSP to improve protection against XSS and improve user privacy.

No javascript is supposed to be executed on the error page.

Such web sites are meant for anonymous access only, to improve CDN usage.

Do not load any JS, because the gadget may crash too, as no erp5 field is rendered

Allow users to go to the homepage.

Prevent img to increase the page width.

Most listbox functionnalities are not supported by web_js_style for now, as no form is used by default

Their contents is already provided by the HTML page template.

Generate a hfeed in the HTML rendering.
https://indieweb.org/feed

Provide a RSS feed automatically.

Only generate the feed when rendering the web section in view mode.

Extract all feed informations in Javascript to allow styling it as a blog.

Add bt5 dependency to erp5_dms to retrieve the author title.

This allows called script to call script on them

This stopped working when the signature of Message.__init__ changed in
06aee0c2 (CMFActivity.ActivityTool: Use uid for identity check instead of
oid., 2019-09-17)

"Access Tool" sounds like a tool to access, but this setting is about
giving access to ERP5 tools from the module list.

See merge request nexedi/erp5!1509

See merge request !1510

we have such error:
....
if context.getValidationState() in ["draft", "deleted", "cancelled", "archived"]:
  Module Products.ERP5Type.Accessor.WorkflowState, line 60, in __call__
    return wf._getWorkflowStateOf(instance, id_only=1)
  Module Products.ERP5Type.Core.Workflow, line 609, in _getWorkflowStateOf
    state_id = 'state_' + status.get(self.getStateVariable(), None)
TypeError: cannot concatenate 'str' and 'NoneType' objects

This stopped working long time ago, probably with slapos commit aa102f28f
(erp5testnode: use newer shellinabox, with a caddy frontend, 2018-09-21)

Web Site/Section were still indexable when rendering in xhtml style.

See nexedi/erp5@6c5db57b

See merge request nexedi/erp5!1504

See merge request nexedi/erp5!1508

using parallel list fields cause HTML to be very big and is not good
for usability, because we typically select a lot of values in these fields.

This can sometimes be useful during development

See merge request nexedi/erp5!1502

ERP5ReportTestCase also import ERP5TypeTestCase, so if we reload it it
patches again getRequest to a function calling itself and causing
RecursionError.

See merge request nexedi/erp5!1505