Business Link can be found on movement by using predicate, so there is no need
to require it while calling isBuildable.

And in case if no Business Link is found: directly on indirectly, drop to
previous behaviour.

fix a condition of Organisation_view/my_default_email_url_string so that only one email field is displayed on a new Organisation document.
same as 310356dd.

But Still store the use-case elapsed time as integer.

- add no header section to define the header is not existing depending on
  the condition

Fix url calculation.
Pass only applicable arguments to conversion API.

Handle the case when substitution happens on web page module context (i.e. reindex, or mass pre conversion) then fall back to ERP5 site as a Web Site.

Use trade phase to match movements.

Note: Trade phase is setup twice: once on object and then as
membership_criterion_category.

Remove security settings script as it causes issues with real system which provide their own (and it's good to split security from core implementation of DMS)

Conflicts:
	bt5/erp5_simulation_test/bt/revision

Introduced by mistake in 7ff48df4

move too generic solvers from erp5_simulation to erp5_simulation_test, because they should not be used as they are in real applications.

Add test to show a failure ot web page to image when more than one external image is used in web page body.

Just use use category.

As lazy causality is added to buildable movements, differentiate assertion.

Separate discount and tax phases.

It is required to match movements.

It allows to match not directly connected Simulation Movements with links.