[FIX] pivot: update pivot formulas when data set changes

[LucasLefevre]

Description:

Steps to reproduce:

• create a pivot based on a range
• remove the =PIVOT(1) formula
• add a few individual PIVOT.VALUE or PIVOT.HEADER formula
• change values in the range data set => the formulas are not updated

Task: : 4082765

review checklist

• [ ] feature is organized in plugin, or UI components
• [ ] support of duplicate sheet (deep copy)
• [ ] in model/core: ranges are Range object, and can be adapted (adaptRanges)
• [ ] in model/UI: ranges are strings (to show the user)
• [ ] undo-able commands (uses this.history.update)
• [ ] multiuser-able commands (has inverse commands and transformations where needed)
• [ ] new/updated/removed commands are documented
• [ ] exportable in excel
• [ ] translations (_t("qmsdf %s", abc))
• [ ] unit tested
• [ ] clean commented code
• [ ] track breaking changes
• [ ] doc is rebuild (npm run doc)
• [ ] status is correct in Odoo

[robodoo]

[rrahir]

@robodoo r+