Antoine Guenet
bb37bd915e
When starting the mass_mailing design option, some manipulations are done on the `#design-element` style element. This can result in sudden style changes when clicking the design tab. This commit makes it so these manipulations are done as soon as mass_mailing starts. In order to do that, constants were shared from mass_mailing_snippets. closes odoo/odoo#88318 Related: odoo/enterprise#25753 Signed-off-by: David Monjoie (dmo) <dmo@odoo.com>