Mostly to translate Open allocation state (causing test to fail)

See merge request !518

   The selenium dont assert well with \n and code, so play safe and just assert line by line.

   This ensure data is saved before render a new form.

  This strips the form rendering from the parameter editor, and placing it as a stand alone editor (separated gadget).

   This allow us following the same API use other gadgets as parameter editors.

This fixes bug https://project.nexedi.net/#/bug_module/20210603-1C66F4F

See merge request !521

See fba76904

See merge request !519

See merge request nexedi/slapos.core!517

   Ignore to check if price matches if the invoice was created manually, and not linked to a business process.

See merge request !516

Improve hateoas support to show shared instances.

It turns out that ERP5 returns
```
'form_id': {
  'type': 'StringField',
  'key': 'form_id',
  'default': 'InstanceTree_viewAsHateoas',
},
```
for the `form_id` in hateoas, so adapt the proxy to do the same.

Currently hateoas support in proxy only lists non-shared instances,
so this always says that the instances are not shared.

See merge request nexedi/slapos.core!511

See merge request !514

   Set it non-editable

See merge request !513

See merge request !509

   This script isnt used at all

See merge request nexedi/slapos.core!504