Improved and fixed twig reference
minor #4313 Improved and fixed twig reference (WouterJ)

This PR was merged into the 2.3 branch.

Discussion
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Improved and fixed twig reference

| Q   | A
| --- | ---
| Doc fix? | yes
| New docs? | yes
| Applies to | 2.3+
| Ficket tickets | #4301

Removed the ugly looking tables and added some more details.

Commits
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ad6b084 Improved and fixed twig reference