[FIX] mass_mailing{_sms}: fix various views for proper behavior

This commit fixes few views related to mass mailing for ensuring their
proper behavior. The changes are listed as below:

 - in the mass mailing form view (view_mail_mass_mailing_form), made the
   mailing_type field readonly if the mailing is not in draft state to
   prevent switching the type once mailing is launched.
 - in the mass mailing sms form view (mailing_mailing_view_form_sms), made the
   'body_plaintext' field readonly if the mailing is in sent/done state to
   prevent sms content modification after the sms are already sent

Task ID-2390284
COM PR odoo/odoo#62740
ENT PR odoo/enterprise#15098

Signed-off-by: Thibault Delavallee (tde) <tde@openerp.com>

0 files changed, 0 insertions, 0 deletions