4.8.8 (2021-01-14) Bug Fixes dropdown: fix the issue of Dropdown close event (#1455) (76e060d), closes #1435 picker: fixed the non-unique key in the Picker option when groupBy (#1453) (1f9f790), closes #1419 whisper: fix overlay jittering when the cursor is hovered (#1454) (6537057), closes #1402
