Redturtle.volto

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- Remove dependency with *collective.volto.cookieconsent*.
[cekk]
- Add more block indexers for SearchableText.
[cekk]

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- Avoid acquisition in find-broken-links view when checking blocks.
[cekk]

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- Fix typo in filename generation in "find-broken-links" view.
[cekk]

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- Add view "find-broken-links" that return a csv file with a list of contents with broken links in blocks.
[cekk]

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- Fix SummarySerializer for collection exporting
Links
[lucabel]
- remove newsitem template override, use default dexterity view for newsitem in backend
[mamico]
- Customize display-file to allow to download files with proper filename.
[cekk]
- Add "type" to EXCLUDE_KEYS in blocks serializer/deserializer to not convert this slate attribute.
[cekk]

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- Allow to select which image miniature use in
RSS
[lucabel]