[IMP] pivot: add menu items to collapse/expand all groups

[hokolomopo]

[IMP] menu: hide parent menu if empty

A menu item would still be displayed if all its children were hidden,
opening an empty submenu. We had to manually add a isVisible logic
to all parent menu items to avoid this.

This commit make it so that a parent menu item is automatically
hidden if all its children are hidden.

[IMP] pivot: add menu items to collapse/expand all groups

This commit adds menu item int he right click context menu to:

• collapse/expand a pivot group
• collapse/expand all pivot groups

Task: 4942260

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]