LiveCursor:Hoverable Label

Build 416 on next
Reviewing disabled
Baselines
Build 413 on next
View Storybook
View Storybook
Baseline History
Build 416f66ee78
Current build. There are unaccepted changes, so build 413 is still the baseline.
Build 33089e219a
Accepted by Yadong (Adam) Zhang.
Commenting is disabled because there's a newer build on this branch