Bug Fixes
- core: avoid re-use the removed controls of fieldArray (ce02649)
- core: rely on ngZone to detect changes instead of changeDe… (#2027) (2e838a0), closes #2018
- core: take account of custom formControl value changes (#2017) (c8dacb5), closes #2016
- core: update validity of detached field control (503e793)
- json-schema: ensure default value is applied on switch oneOf schema (f04cdde)