Add the ability to configure the filter clause
This allows to control the filter clause in the simple match profile
query. This is a bit verbose but I was not sure what approach was
I prefered to go with the flexible approach so that we can adjust
various threshold based on feedback (mostly min should match).
The other approach would be to move the filter definition into the
This is the first patch in a set to allow switching query builder
profile for crosswiki searches.