cubicweb #5227442 Allow overriding CSVView's separator [validation pending]

Useful for the company and person cube to reuse this view with uicfg instead of printing out its own attribute table.

prioritynormal
typebug
done in3.20.7
load0.250
load left0.000
closed by#bfe33b5710d1 [web/views] Allow changing CSVView's separator (closes #5227442)
patch[web/views] Allow changing CSVView's separator (closes #5227442) [applied]