[IMP] dashboard: automatically reorganize a sheet

[hokolomopo]

[IMP] dashboard: automatically reorganize a sheet

This commit aims to simplify the process of creation of a dashboard
with two new features:

1. A context menu item to send figures and ranges to another sheet
2. A context menu to reorganize a sheet in a "dashboard-y" way.

Both features are implemented in the ReorganizeSheetPlugin. Sending
a figure/range to a sheet works by finding the bottom-most used cell
in the sheet and placing the figure/range below it. "Used" cells are
cells that contains some content/a merge/a table/overlap a figure.

Reorganizing a sheet works by:

• put the scorecards at the top of the sheet
• put the figures below the scorecards
• put the cell "clusters" (zones of contiguous cells) below them

Technically the reorganization is done by creating new rows at the
bottom of the sheet, cut/paste the clusters correctly ordered in
these rows, and then delete the original rows. See Odoo task's pad
for why we do it this way.

[IMP] mergeContiguousZones: add test & fix diagonal

This commit moves the tests of mergeContiguousZones from Odoo
to o-spreadsheet.

It also fixes a bug where the algorithm was merging zones that were
diagonal to each other.

[REF] clipboard: decouple clipboards and active sheet

This commit make the clipboards handlers independent from the active
sheet, thus allowing to use them to copy/paste things in any sheet.

[IMP] clipboard: insert new rows when pasting charts

Currently, when pasting a chart at the edges of a sheet, the pasted
chart is shifted so that it doesn't go out of the sheet.

This commit changes the behaviour so that now the chart is always
pasted with its top-left corner at the top-left corner of the selection,
and insert new rows/columns if needed so that the chart fits in the
sheet.

Also take the occasion to factorize the code in common between the
chart clipboard and the image clipboard into the figure clipboard.

[IMP] clipboard: instanciate clipboards only once

This commit make the different clipboards instance attributes of the
Clipboard plugin, instead of being created each time a paste or copy
action is done.

This:

• is a bit faster and less wasteful
• allows the clipboard instances to be exposed to other plugins
• will be necessary for a future refactoring of the clipboard plugin
  where each clipboard will have its own copied data, instead of
  having a big copied data object shared between all clipboards.

[REF] clipboard: expose paste logic

This commit extract the logic of the paste operation of the
clipboard plugin into a new getter (getPasteTarget) and a new command
(EXPAND_SHEET_FOR_ZONE) so that it can be reused in other parts of the
code.

[FIX] evaluation: getEvaluatedCells with spreading cells

The getter getEvaluatedCells does't return spreaded cells. It
also returns empty evaluated cells that have some style.

This is not the expected behaviour. getEvaluatedCells should return
all the non-empty evaluated cells of a sheet.

Task: : 3869372

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]

Pull request status dashboard.

[LucasLefevre]

I kinda like the cut icon for this