Drop concatenated title of 'Add' dialog for details of entity
As for now the 'Add' dialog title, which is initialized within
details of the entity, contains translated concatenated texts,
like:
'Add ${other_entity} into ${entity} ${primary_key}',
where 'other_entity' and 'entity' are also translatable texts.
This construction is used via method 'show_add_dialog' of
association_facet for the all 'Add' actions within details
of entities.
The concatenation leads to a bad quality translation and
should be changed to an entire sentence.
From now a mentioned title is taken from a spec and should be
specified explicitly.
Fixes: https://pagure.io/freeipa/issue/7712
Fixes: https://pagure.io/freeipa/issue/7714
Reviewed-By: Serhii Tsymbaliuk <stsymbal@redhat.com>