[FIX] base,website_sale,gamification: prevent quick create of new field

When user tries to quick create a field where model is not specified, the error
will occur.

Steps to reproduce:
1. Turn on developer mode.
2. Go to Settings > Technical > Fields Selection.
3. Create a new record and quick create a field.

Traceback will be generated.

Applying this commit will fix this issue.

sentry-3956146718

closes odoo/odoo#123667

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