Multiselect item is actually affected by a lot of minor and major issues.

It is almost never really used because checkbox item performs the same tasks and this seems to be the reason why none still rose up with a request bug fixes.

Among them:

• the `"No Answer" as default` option is missing in spite of what it has been done for all the other items
• providing a "blank" answer (each item not selected) saves a wrong answer to the database
• the standard used for the value saved to the db is different from the one used for all the other items