PRD-4129, PRD-4317 and fix for golden samples crosstab reports 

PRD-4317: In 'Select Datasource' dialog ensured that delete action is only active when datasource is selected. 

PRD-4129: Legacy mode. Finalization needed. Not changing width-system for now, using min-width as in 3.9 codeline.

Golden samples used a datasource that was based of an non-fix-seeded random-generator and thus the results were random. That breaks the golden samples