Steps to reproduce the bug:
- Add multiple images on a product page
- Go to the shop and edit an image of this product by double clicking
on a small image on the carousel thumbnail
- Save
-> Nothing happens and the image is not updated
The goal of this commit is to ensure that a field of type image is not
`readonly` before adding the `contenteditable` attribute to its image.
task-3122670
closesodoo/odoo#114598
X-original-commit: 36fb7654b785888f100d5163e6cebd788c3c042a
Signed-off-by: Benoit Socias (bso) <bso@odoo.com>