Merge tag '2.1.9' into release/2.2.0

[stefanheimes]

This is a bugfix release.
This release has:

• Disable the versioning in the legacy data definition if is enable. The versioning comes as feature in a later version. Edit template references non-implemented version model #553
• Add missing select in DefaultDataProvider#getVersion()
• Fix typo in active version retrieval
• Fix versions fetch in DefaultDataProvider
• Fix typo: 'tl_version.formTable' -> 'fromTable'
• Add exception if palettes null in the palette collection Add exception if palettes null #556
• Change operations to fix DBAL error see Data provider dbal utils broken doctrine/dbal 2.11.0/.1 #549
• Add fallback for id property in tree picker
• Fix the amount for filter all in the default limit element

Description

Please explain the detailed changes you made here.
Reference any issue number this pull request fixes.

Checklist

• Read and understood the CONTRIBUTING guidelines
• Created tests, if possible
• All tests passing
• Extended the README / documentation, if necessary
• Added myself to the @authors in touched PHP files
• Checked the changes with phpcq and introduced no new issues

[stefanheimes]

Master was 1 commit for release. But everything seems to be okay. So we can close this PR.