- Add EXT:seo fields to TCA
- Adapt og:image handling

[BUGFIX] Disallow pagination pages greater than the allowed max number of pages (SEO), Cleanup in parallel

[TASK] Remove the recalling of the indexAction, because it is not needed anymore with the languagevisibility changes

[BUGFIX] Fix totally broken page browser implementation, Cleanup code / Remove dead code / Fix potential error cases

update documentation, add example on how to add multiple news feeds with different configurations (different content per feed).

- Group by Tags: Not respecting the rootline, if the option onlyNewsWithinThisPageSection is true.
- Group by Categories: Not resprecting the rootline, if the option onlyNewsWithinThisPageSection is true. Also not respecting the multi language behaviour of the TYPO3 9 pages table.
- No grouping:  Not respecting the rootline, if the option onlyNewsWithinThisPageSection is true.

[BUGFIX] Fix the selection of news by category if categories are translated but news are just set to "force" by languagevisibility

flexform config for all plugins

Integrate a general function into the AbstractController to
handle offset calculation for the pagination.