This commit makes the image options initialization more robust, by
- checking at the beginning if the specified `src` and `data-original-
src` attributes match with existing files.
- checking if there is a `data-original-src` attribute before applying
the ImageTools options (shape, filter,...).
This is needed because in the case of wrongly hardcoded templates (e.g.
in customizations), it is sometimes not possible to drop any snippet
after dropping an incorrect one. This happens because the image
`SnippetEditor` is not correctly created. Indeed, the start of the image
options is never completed because the promise rejections when a file
does not exist are not properly caught, interrupting the initialization.
Therefore, ensuring that the files exist beforehand prevents these
issues from happening.
opw-3137732
closesodoo/odoo#118546
X-original-commit: 93ddaac87a76d6d1775e0b3e30bb66ca85147503
Signed-off-by: Quentin Smetz (qsm) <qsm@odoo.com>