With multi-websites, we expect qweb views to have a key set as it is the key
that is used to find duplicates (two views with same keys are duplicate, the
one with a website_id set is more specific than the one without a website_id)
Thus, 5ff87e8039 sort on key in order to find the most suitable one.
It would crash if a qweb view is created without a key (False) as it can't sort
`bool` and `str`.
This commit:
- Adds a generated key to scss views
- Adds an SQL constraint to avoid QWeb views without a `key`
- Generates a random key when creating a QWeb view without a `key`
- Handle False key in `filter_duplicate()` by extracting views with False key
before sorting, and then adding these views to the recordset
Note: We also want the key to be editable as it is now an important field with
multiwebsite. Thus, we removed the readonly on this field.
+ fix python tests as we now force key on qweb views with sql constraint
+ pep8