Before this commit two options of images are named "Width":
- the one that adjusts the image resolution
- the one that changes the `width` CSS property
This commit makes the following changes:
- the option about the image resolution is renamed to "Format"
- the "Format" option combines the image resolution and the file format
- an option item gives access to the initially uploaded file format and
resolution
- for all sizes the image format is set to `image/webp`
- for the uploaded size, an `image/webp` version of it is available too
- upon upload, the default selection is an `image/webp` version of the
image
task-2774352
Part-of: odoo/odoo#85494
Benoit Socias
4d3819b221