Some users might be able to post messages without being able to modify
the support request

This is better than getting it in another HTTP request.

no need to to request server for this

 * format code as jslint expects it
 * use RSVP.Queue instead of Promise

When this is called in the test suite, the current user is already
logged in as manager.

So that we can see if a post was ingested or not.

This is more understandable

and add a few assertion on the posted messages content

using momentjs that's already bundled in jiodev.js

https://www.erp5.com/documentation/developer/guideline/module/erp5-Guideline.Module.Creation#set-form-encytype-to-multipart/form-data-when-using-file-upload

as a result, attaching files when submitting support request was not working

Also:
 * post are now HTML and not plain text
 * all event types are returned by
SupportRequest_getCommentPostListAsJson (so that the app can also
display support request used in "traditional" erp5 interface)
 * instead of immediate reindex, we store the "just posted" data in
portal_session.
 * events are created using resource defined as a web site "layout"
property (that's not yet editable)
 * posts do not receive a message-id yet (because ui part is not yet
updated for that), so generate a message-id server side (by just using
id)

* add a `source_reference` field to store message-id
* store the raw content "as is" - there is not preview for this reason (
  because it might be unsafe html or whatever)
* remove proxy roles on scripts. User must have permission.
* minor simplifications

/reviewed-on nexedi/erp5!763

This snapshot were made on Chrome 70 (ChromeOS) with a 1001x932 window
(innerHeight x innerWidth)

To Compare a "screenshot" of a DOM element with a reference snapshot.

This check supports the following parameters:
 *   locator - an element locator
 *   misMatchTolerance - the percentage of mismatch allowed. If this is 0, the
      images must be exactly same. If more than 0, image will also be resized.

https://github.com/niklasvh/html2canvas Copyright (c) 2012 Niklas von Hertzen

from https://github.com/HuddleEng/Resemble.js/blob/v2.10.2/resemble.js © 2013 Huddle

to get stable sort and prevent "random" test failures.

"Restore" sounds a bit strange to me in this context.

So that we can wait for this in the tests

[erp5_officejs] Use upload_dict instead of file_extension to check for correct file-type during notebook upload

Also, exlicitly specify the txt extension during download

/reviewed-on nexedi/erp5!760

/reviewed-on nexedi/erp5!762

Also, update tests for notebook to check for Upload page

/reviewed-on nexedi/erp5!764

Fixes rendering when using Chameleon:
  ValueError: only strings can be translated, not: <ERP5Type.Message.Message for ...

/reviewed-on !747

/reviewed-on !765

adjust font url