PURPOSE
Avoid flickering and incorrect display of warning box in SMS when updating
the number to contact.
SPECIFICATIONS
Currently when an user uses composer to send an SMS, number is validated
at onchange. It leads to two issues
* jump of content as a warning box appears;
* visual warning displayed after user may have clicked on "Send"
button, leading to warning not being useful;
We choose to validate number in real time in order to give directly
a feedback to the user. It also lessens flickering on composer screen.
This is done by allowing to trigger the 'change' event on key down. This
requires a specific onchange_on_keydown option to be used on char field.
LINKS
Task ID 2229050
PR #51159closesodoo/odoo#52962
Signed-off-by: Thibault Delavallee (tde) <tde@openerp.com>