Make clauses more robust + use them in presenter queries

[justim]

Make clauses more consistent in SQL and PHP form

Generating SQL with a clause or applying a clause to a collection should
result in the same outcome. There is a difference in behavior for empty
Multiple clause for condition clauses and ordering clauses.

• The implementation of empty Multiple clauses was wrong for SQL, it
  should not match anything. This now matches the PHP implementation.
• Multiple ordering clauses were not properly applied to a query, the
  logic for condition was used, which is not right

Include clauses in presenter queries

Previously the presenters would only use the clauses to filter and/or
order the found entities after the query was run. This might be wasteful
if the clause is used to only select a small subset of the query result.
Using the clause in the query makes the query less wasteful, this
behavior is skipped if the entity pool has a request for different
clauses for the same entities.