Make DYNAMIC view widget use getColumnRender
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Merged
Tweak handling of missing value
Render the sums serverside, instead of letting datatables to this

If this approach is OK, we can remove fnFooterCallback from OpenView.
If someone wants to use it, they can add it in the field settings
(included via ${params}).

The generateTableFooter function could stay for use from such a
field settings usage.

This pattern would have to be documented with an example.
Merge branch 'github-main' of github.com:plomino/Plomino into jean-getColumnRender

Conflicts:
	Products/CMFPlomino/PlominoColumn.py
Restore 'oLanguage' (mistakenly excluded)
Merge pull request #414 from plomino/jean-getColumnRender

Make DYNAMIC view widget use getColumnRender