fireworks adaptations to HGC

Conflicts:
	Fireworks/Geometry/src/FWRecoGeometryESProducer.cc
never allow linking in the same layer, use seed merging only collect seeds deeper/shallower than what is being tested
retune HEF/HEB clustering
working on rechit view stuff
Merge pull request #5847 from lgray/lgray/HGC-Linking-inprogress-SLHC19

More HGC Linking Incrementals