probes do not reset search tree

polyMesh::movePoints does not clear out the cellTree so there might be an inconsistency between tree and mesh.

(the only other data field not clear is the tetPtBaseIs but that probably does not want clearing)

Issue came up in probes with fixedLocations_. Attached workaround for probes.C. probes.C

but probably needs to go into polyMesh::movePoints