For surveys, we want to allow the end-user to un-tick an option he had ticked
before, for any kind of questions with choices (simple / multi-choices and
matrix).
e.g: You select an option but on second thoughts you're unsure it's the right
answer, you want to be able to remove your answer.
Especially if the question is not mandatory and you loose points if you don't
answer correctly.
Since the base browser behavior does not allow un-ticking a previously ticked
radio input, we have to play around a bit with specific classes.
Task-2727592
closesodoo/odoo#82272
Signed-off-by: Thibault Delavallee (tde) <tde@openerp.com>
Aurélien Warnon
b2e56259cb