Fix CRAB2 with input validation
Remove Page un-used Page import
Allow user processed datasets names for CRAB 2
Merge pull request #283 from giffels/dbs3-input-validation

Dbs3 input validation
Allow user processed datasets names for CRAB 2
Merge pull request #284 from giffels/dbs3-input-validation

Allow user processed datasets names for CRAB 2