[FIX] web_editor: fix summernote text drop on firefox

[jvnm-dev]

Issue

- Have firefox
- Go to any chatter
- Open full editor
- Write some "test" words with line breaks
- Select one of your "test" words
- Drag & drop it somewhere else in the editor

Welcome on test.com! (redirected)

Cause

Summernote doesn't preventDefault on drop event, so firefox
think we want to go to another URL.

Solution

Add the preventDefault manually.

This reveals another issue which is solved by importing
this PR's code https://github.com/summernote/summernote/pull/3327
(with adaptation for our dinosaurus version)

OPW-2158112

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[jvnm-dev]

@nle-odoo What do you think?

[nle-odoo]

looks good, we normally try to avoid fix in external library but since it's an adapted backport of the current version, that might be alright

The e.preventDefault is not in the linked version of summernote, isn't what they did:

summernote/summernote@d8e9e95

enough to make it work?

it seems a little odd to prevent default on the whole document, I think it's possible to have another zone on the page where we would not want to prevent default.

robodoo delegate+

[nle-odoo]

also I used to put around the code I changed in the library:

/* ODOO: (start_modification */
... the code I'm adding or modifying
/* ODOO: end_modification) */

so when we update it it's a little easier to understand where we changed things, but I don't think we are going to update from this version.

[jvnm-dev]

Indeed, it's better to do it only for the dropzone event! I added the comments, just in case.

[jvnm-dev]

robodoo r+

[fw-bot]

This pull request has forward-port PRs awaiting action (not merged or closed): #42755