Purpose ======= Allows the user to easily import mailing contacts. Specification ============= Add a button "import" on the top of the mailing contact list view. This button open the wizard <mailing.contact.import>. So the user can select the mailing list and import his contacts with a text field, one line for each contact. Task-2703521 closes odoo/odoo#82333 Related: odoo/enterprise#23263 Signed-off-by: Thibault Delavallee (tde) <tde@openerp.com>