[FIX] Chart: Fix flicker when copying chart as image

[rrahir]

When copying a chart as an image, we create a new div with a canvas to draw the image inside of it. However, the said div breaks the layout of the spreadsheet during its short existence span.

Task: 4725067

Description:

description of this task, what is implemented and why it is implemented that way.

Task: 4725067

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]