Eea-daviz

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* Change: Added support for null value for slickgrid boolean fields
[olimpiurob refs 19206]

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* Change: Made Daviz Visualization plone_lock_info aware
[voineali refs 19172]
* Bug fix: Disabled rename on spreadsheet when editing an already existing visualization
[szabozo0 refs 19149]
* Feature: Added file type to allowed content types list, required for saving svg versions of the charts
[szabozo0 refs 18910]
* Change: Added tutorials link on edit page
[szabozo0 refs 18400]

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* Change: Always display the tutorials and example links on edit
[szabozo0 refs 18400]
* Change: Link video tutorials within documentation
[avoinea]

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* Bug fix: Fixed path handling of internal links
[ghicaale refs 16666]

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* Bug fix: Fixed the case then provenance URL points to a view or template
[ghicaale refs 16666]
* Feature: adding Sphinx-generated documentation in Page Template format
[batradav refs 9502]

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* Bug fix: Don't reload edit page after a file was uploaded
[szabozo0]
* Feature: When adding internal link for data provenance add the object as a related item
[ghicaale refs 16666]