This commit reverts the saas-12.2 editor by putting back the editor
of Odoo 12.

The saas-12.2 editor was an intermediate work between the previous
editor of Odoo 12 and the new one slated for Odoo 13. It was unstable
but it was supposed to be replaced by the new editor of version 13.

However, since the new editor has been postponed to Odoo 14, the
saas-12.2 one would have been staying in Odoo 13, which would have
been a nightmare to maintain. To avoid this outcome, we chose to
put back the 12.0 editor in its place.

This has the particular advantage that Odoo 13 will share the same
bugfixes as Odoo 12 and 11 as they all run under the same core
editor, while the saas-12.2 one would have been an entirely
different beast to maintain.

This is a partial revert of f2969923.

Part of PR 35677.

Co-authored-by: Nicolas Bayet <nby@odoo.com>
Co-authored-by: Antoine Guenet <age@odoo.com>
Co-authored-by: Christophe Matthieu <chm@odoo.com>
Co-authored-by: David Monjoie <dmo@odoo.com>

This commit removes the field `datas_fname` from `ir.attachment` as
it was unnecessary and most of the time the duplicate of `name` or
`url`.

Task #1909865

closes odoo/odoo#32976

Signed-off-by: Martin Geubelle (mge) <mge@openerp.com>

* = website, website_blog

The goal is to give the user an opportunity to optimize his images before using
them.

For this we introduce a preview/configuration dialog after every image upload,
where appropriate default values are filled for the quality and resolution,
based on where the image is going to be used. Since this is not going to be
perfect all the time, we still allow the user to configure them, and we display
a preview to ease this process.

Indeed it is important for SEO and for usability in general that the images are
as light as possible in size.

Technically the original image is uploaded and saved first, and then it can be
optimized. This way the upload only happens once, and the preview can be
computed from the already saved image.

task-1930726
PR: #31208

Issue: can't drop a image if the editor is not focused or if the editor is
empty

The link and media tooltips were not taking Summernote's `tooltip`
option into account. That option ensures that tooltips are disabled if
the option is off (which is for instance the case on mobile).
This fix ensures that these tooltips are disabled when the option is
set to `false`.
It also disables tooltips in the keyboard tests. They are not relevant
to the keyboard tests and occasionally caused the DOM to not be properly
cleaned after the tests were run (most likely due to their 2000ms
`setTimeout`).