Summary:
## Export Data
- Add close button to the export sheet.
- Show status updates while exporting Flipper data.
- Fix Fresco data export (0c0f0d4a90).
## Headless
- `select-plugins` cli argument added for the headless flipper
## Miscellaneous
- Generate TLS certificates in the past to allow for clock skew. (9a97b3b45b)
- Speed up Redux dev tools (ce93ecfcca)
- Add stricter ESLint rules.
- Speed up `yarn start` (10559a188f).
Reviewed By: passy
Differential Revision: D16418562
fbshipit-source-id: 8ab9c3264c2a367125f8235dd07129e67441a0e4
83df20a202