Cleanup clientfolder contents method

Conflicts:
	bika/lims/browser/clientfolder.py
Secondary sample reference widget only displays samples in due or recieved states
issue #879 fail to transition secondary AR analyses.

Conflicts:
	bika/lims/browser/analysisrequest.py
Merge branch '3.01a' of github.com:bikalabs/Bika-LIMS into 3.01a