Prevent false "required" attributes in ReferenceWidget template

A little verbose but neater than e922048
Spelling error in computed AR/ProfileUID
Fixed #596 Batches icon
Allow select different icons for analyses out-of alerts for different sub-products
Add icon missing in Batch > AnalysisRequest
Fixed #649 [Add+] button missing for Cases and ARs in Clients at the moment
load_setup_data import changes for allowing inheritance in child products
Merge branch '3.01a' of github.com:bikalabs/Bika-LIMS into 3.01a
issue #643: Error creating multiple ARs when using copy-values button with Reference fields.

ReferenceWidget has a hidden *_uid field, which was not being populated correctly.