Make some MIS reports columns invisible

[pedrobaeza]

On the context of creating complex MIS reports involving several companies, budgets, etc, you may need for example to have a consolidated budget, but the budgets can be done only by company, so you need to put one column per company budget, and then a column that is a sum of all of them.

The only interesting column to be shown is the sum one, but you can't hide the rest.

I don't think we can right now get this by any way, isn't it? Do you consider this feature interesting?

[pedrobaeza]

@sbidoul what do you think?

[sbidoul]

Yes that makes sense. There is a hide_always style that is already used to hide rows, so it would be nice to use that for columns. That would require to do #647 first, though.

[github-actions]

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