[FIX] web: correctly evaluate domains and contexts in dialogs

An error occurred if the domain or context applied on a view
opened in a dialog needed to be evaluated (e.g. if they contained
something like [['some_field', '=', uid]]). For instance, create
a custom filter with such a domain for the Contact model, then go
to Contact, create a new one, and on the parent_id many2one, click
on search more. Before this rev, no eval context was given so the
domains and contexts couldn't be evaluated, and it crashed.