Widget column selection general configuration

[Tomansion]

Is your feature request related to a problem? Please describe.
All widgets have to check for their columns, we could define, in a func or in conf, rules about columns unique values limit and type. The widget will only the compatible functions to be selected.

Maybe a parameter of the columns component modal ?

Maybe ask a designer what would be the best way to give a hint on what column to use

TLDR : Widgets can set warning rules, commanded columns types or category, and unsupported columns.