[IMP] chart: keep data series when switching chart types

[hokolomopo]

Description

Currently if you have a bar chart with 3 ranges, switch to a gauge chart that only accept a single range, then back to a bar chart you will lose the 2 other ranges.

This commit fixes that. The ranges are kept in the store so we can switch between chart types without losing data.

There is one issue however: we do not make any difference between ranges lost because the chart type changed, and ranges lost because the user manually removed them. So if a user change chart type => remove a range => change chart type again, the removed range will be back.

This commit also fixed another issue that the chart creation context was not dependant on which figure was edited.

Task: 4282798

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]