[WIP] Version history

[SimonGenin]

Add a version history sidepanel, containing a list with all the revisions. When opened, the spreadsheet goes in readonly mode. When a revision is selected, the spreadsheet display its state when the revision occured.

Odoo task ID : 3142006

review checklist

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

[robodoo]

Pull request status dashboard.