[BUGFIX] Forms: Add missing db fields
[CLEANUP] Minor TCA cleanup
[TASK] Forms: Add tree examples for type=select
[TASK] Forms: Add filter and wizards
[TASK] Forms: Add todo regarding a documentation mismatch
[TASK] Set extension compatible with core version 7
[TASK] Forms: Add type=group tests
[TASK] Forms: Add type=none tests
[TASK] Forms: Add type=passthrough test