1. Listbox can only show selected item
2. Don't lost previous query parameter in filter&sort editor

1. use QueryFactory to process query in filter editor and listbox
2. add draft support for sort editor
3. add layout for hide rows functionality in listbox

Still non-UTF-8 bytes will be lost, but better than nothing for debugging purpose.

This will ease debugging from posted test results.
This code should be synchronous (no Blob asDataURL method for example) and so, btoa is used.

Sadly, btoa will fail with unicode character
Do not report HTML error in such case, until a cleaner dataURL is implemented

Creating a renderjs gadget that follows a standard interface
to get, edit and save spreadsheet document using jio. Spreadsheet
gadget is based on onlyOffice editor.
Format of spreadsheet document that can be edited in renderjs gadget
is xlsy. At present the spreadsheet document conversion from any
(xlsx, ods, etc) to xlsy is done automatically during first
synchronization with gadget by cloudooo.

URL navigation of ERP5JS has been fixed and test updated.

This will allow to catch possible errors.

Mostly, header gadget is rendered after the main gadget.
Remove many zelenium 'pause' command, by waiting for the expected element instead.