also str representation of unicode character is different.

Thanks to Vincent Pelletier for his help on this bug fix.

See merge request !1782

also set hide_rows_on_no_search_criterion to force displaying the list
even without search, this is a report, we we always want to see records.

See merge request !1781

This is done on the process running test (by
ERP5TypeTestCaseRequestConnection) and when using timerserver loop (by
TimerServer which calls publish_module), but this was never set in
processing_node.

Before 3b874e49 (ERP5Type/tests: review requests in tests, 2023-04-19)
getRequest could find a request anyway, because the test pached
getRequest to find a request from the app, but after this change
executing activities in an instance running with runUnitTest without
test specified failed with:

    Module importlib, line 37, in import_module
      __import__(name)
    Module Products.ERP5Type.dynamic.component_package, line 412, in load_module
      return self.__load_module(fullname)
    Module Products.ERP5Type.dynamic.component_package, line 379, in __load_module
      erp5.component.ref_manager.add_module(module)
    Module Products.ERP5Type.dynamic.dynamic_module, line 75, in add_module
      self.add_request(get_request())
    Module Products.ERP5Type.dynamic.dynamic_module, line 53, in add_request
      self.setdefault(last_sync, (WeakSet(), set()))[0].add(request_obj)
    Module _weakrefset, line 86, in add
      self.data.add(ref(item, self._remove))
  TypeError: cannot create weak reference to 'NoneType' object

( maybe we remove processing_node and use only timerserver, these two
methods are more or less equivalent for simple cases and timerserver is
closer to what a "real" zope does )

unittest executes the cleanups after `tearDown`, after the ZODB
connection is closed, so accessing database objects cause errors.

According to python unittest documentation, it is safe to call
`doCleanups` ourselves when we need the cleanup to be executed earlier,
this is a typical case where we want the cleanup to be called before
closing the database connections.

ID is not something we like to show to users, modification date and
validation state can be better - this assumes that most of the
relation are made to nodes, which typically have a validation state
and not a simulation state.