3d3ee5da had syntax error and test were
not updated for new behavior

content_type is a bit special, because CMF's PortalFolderBase also have
a content_type method, so this was confusing ERP5Type dynamic properties
system. When the property was never set, the default value was the
method acquired from PortalFolderBase.

Fixes this by defining conten_type class attribute where needed.

This also fixes an old expected failure test, it's now possible to use
edit(content_type=something) in document without content type property
set. It works now, but thanks to what seems to be outdated code in
_valid_property_id from product/ERP5Type/patches/PropertyManager.py,
because we have stopped setting all properties to None in Base years
ago. For now, this works, but because of an outdated condition in
_valid_property_id. We may revisit later in the future.

ZODB Components: Preparation of erp5_base migration from FS: Fix pylint undefined-variable errors: Remove dead code.

keywordsplitter() has never been defined so this code has been broken
since its introduction.

ZODB Components: Preparation of erp5_base migration from FS: Fix pylint undefined-variable errors: get_transaction() removed in ZODB 3.6.

ZODB Components: Preparation of erp5_base migration from FS: Fix pylint undefined-variable errors: ResourceLockedError.

We receive feedback from users saying that "when I view a mail message in event module, I see ugly html source", this was because user had set preferred text editor to monaco. Improve a bit monaco integration so that we display something better than code in a `<pre>`  for non editable editors.

We had another feedback that when using CKEditor as preferred text editor in old UI, users can not click on links when viewing an html Mail Message. But it works in new UI. I did something minimal so that this looks working until the migration to new UI is complete.

/reviewed-on nexedi/erp5!1011

With the current architecture of cache manifest, it was required that
developpers change the cache manifests referencing a web page every time
they change a web page. In practice, developers were never doing this,
so we sometimes had issues where client keep using old version of
website even though a new version has been deployed, when after
deployment we did not change the cache manifest.

To automate the scenario of modifying the cache manifest, introduce a
post-upgrade constraint that will check that the manifest is newer than
all of the referenced pages. If that's the case, the constraint can fix
by modifying the manifest content, which also changes the modification
date of the manifest, which might be used in "if-modified-since"
negociations.

According to spec [1], cache manifest is updated if the HTTP responses
is not "304 not modified" and if the manifest content is not
byte-for-byte identical to the previously cached version.

[1] https://www.w3.org/TR/2008/WD-html5-20080122/#updating1

/reviewed-on !1009

Post upgrader constraint to automatically fix modification date and an upgrader bug-fix for an issue that's revealed in this new test.

/reviewed-on !1013

This tests had a test instance URL hardcoded and was working only on
this instance.

The default size of iframe is too small for CKEditor to display dialogs
properly. Increase the height so that CKEditor display dialog boxes
correctly.

/reviewed-on nexedi/erp5!1010

ZODB Components: Followup of 47b14fd4 making sure that there is only one Delivery to update (as it was before that commit).

Web sections or web sites displaying a default page should have
modification date after the modification date of their default page, so
that the "if-modified-since" requests can be replied with a 304 not
modified responses.

Upgrader detects that if some type have constraints and their container
type also have constraint, it's not needed to check again this type
because since checkConsistency is recursive when the container is
checked they will also be checked.
This fails when we have situtations like:

  X is allowed in Y
  X is allowed in Z

and there are constraints for by X, Y and Z.
This was raising a KeyError when pop'ing Z :

    Module script, line 50, in Base_getConstraintTypeListPerPortalType
     - <PythonScript at /erp5/Base_getConstraintTypeListPerPortalType used for /erp5/portal_alarms/upgrader_check_pre_upgrade>
     - Line 50
      type_list = constraint_type_per_type.pop(allowed_content_type)
    Module AccessControl.ZopeGuards, line 104, in guarded_pop
      v = guarded_getitem(d, key)
    Module AccessControl.ZopeGuards, line 83, in guarded_getitem
      v = object[index]
  KeyError: 'Z'

In fact, this code is wrong, because if Z is also allowed in W and W
does not have constraint, then Zs inside Ws will not be migrated. In
practice, that's probably OK for now, because we don't use migration
constraints on documents so much, most of the time we only do one
script that checks the constraint globally.

/reviewed-on nexedi/erp5!1003

Many typos in: a9d81b09

In xhtml style, clicking on <a> links in a non editable ck editor does nothing. It's possible to to use Ctrl+right click to trigger the popup menu and "open in new tab", but that's confusing for users.

Implement something minimal so that the event handler registered in ck editor gadget also works in html style.

by setting "readOnly" to true.
Monaco also supports applying its style to a <pre> element (like on
https://microsoft.github.io/monaco-editor/playground.html#creating-the-editor-syntax-highlighting-for-html-elements
) but it would be a too big architecture change, a readOnly editor is
enough.

We also sometimes display Mail Message or other documents that are
text/html, it's easier to manage this by content type rather than by a
mapping of portal types.

gadget_editor.js already supports a content_type key in state, but it was not passed by the field definition.

ZODB Components: Preparation of erp5_base migration from FS: Fix pylint unbalanced-tuple-unpacking warning.

ZODB Components: Preparation of erp5_base migration from FS: Fix pylint unused-import and unused-variable warnings.

New workflow actions added in 67f58b5b and b3dc32f5 thus adjust accordingly.

and re-enable coding style test

Rename AccountingZuite_CommonTemplate to ERP5Site_viewAccountingZuiteCommonTemplate

Rename AccountingZuite_createAccountingTransactionList to AccountingTransactionModule_createAccountingTransactionList

Rename AccountingZuite_createAccountingTransactionListSalesAndPayments to AccountingTransactionModule_createAccountingTransactionListSalesAndPayments

Rename AccountingZuite_createAccountingTransactionListWithPersons to AccountingTransactionModule_createAccountingTransactionListWithPersons

Rename AccountingZuite_createDocument to AccountingTransactionModule_createAccountingTestDocument

Rename AccountingZuite_createReportDataset to AccountingTransactionModule_createAccountingTestReportDataset

Rename AccountingZuite_createReportJournalDataset to AccountingTransactionModule_createAccountingTestReportJournalDataset

Rename AccountingZuite_deleteAccountingTransactionTemplate to ERP5Site_deleteAccountingTransactionTemplate

Rename AccountingZuite_initializeAccountingTransactionReportTest to AccountingTransactionModule_initializeAccountingTransactionReportTest

Rename AccountingZuite_initializeAccountingTransactionTemplateTest to AccountingTransactionModule_initializeAccountingTransactionTemplateTest

Rename AccountingZuite_markChanged to AccountingTransactionModule_markAccountingTestDataChanged

Rename AccountingZuite_reportMacros to Zuite_viewAccountingTestReportMacros

Rename AccountingZuite_reset to ERP5Site_resetConfigurationForAccountingTest

Rename AccountingZuite_setAccountReferencePreference to PreferenceTool_setAccountingTestAccountReferencePreference

Rename AccountingZuite_setDocumentSectionPreference to PreferenceTool_setAccountingTestDocumentSectionPreference

Rename AccountingZuite_unsetDocumentSectionPreference to PreferenceTool_resetAccountingTestDocumentSectionPreference