Bug Fixes
- core: detect form validation changes on build (#2856) (c9c26f4), closes #2843
- core: prevent unnecessary wrapper re-render (#2855) (b26d64f), closes #2847
- core: support Set/Map in immutable mode (#2852) (4d688fe), closes #2848
- core: take account of previously disabled control (#2857) (84f47e5), closes #2829
- json-schema: detect change of multischema (#2858) (2296330), closes #2815
- json-schema: do not replace expression properties if required fi… (#2839) (56ee55c)
- json-schema: take account of multischema required prop (#2845) (b9bb77f), closes #2831
- material: use ViewChild static query for checkbox (#2844) (fd52a4c), closes #2838