New features

* 347ffee0 Add an option in Configurator_SequenceTabledrag to skip broken items.
* 41c79c57 (CS) Enhance doc comments in Configurator_CallbackConfigurable.
* 84f8fcf7 (CS) Add public access modifiers.

Changes

Issue #3054355 by pagach: Fix Drupal 8.7 compatibility and update error.

Note: This might break 8.6.x compatibility!

• Added custom template input field
• New design templates
• Removed deprecated drupal_set_message()

• chooseable source language
• default display order first and then other fields
• support for field_group and field_collection
• Add title attribute for images / multiple attributes

Initial working draft of Guide.

Notes:
The target search page is still hardcoded in GuideForm.php, line 270, search parameters work, though.

Developer's release.