*: mass_mailing, test_website, web, web_editor, website, website_event,
website_sale
This commit removes jQueryUI draggable and droppable component to
instead use our own implementation of the feature. This replaces the
last use of the lib: the web_editor drag and drop. This takes advantage
of the code that was already written for other features of the backend.
task-3079246
closesodoo/odoo#136793
Signed-off-by: Quentin Smetz (qsm) <qsm@odoo.com>