moving tables to react-window

Summary:
Tables were using a custom virtualization, which wasn't as performant as other solutions out there. In this diff, the table component is reworked for performance.
- removes `Table` component, because it was never used standalone, `ManagedTable` is what all plugins used
- uses `react-window` for `ManagedTable`
- reworks table highlighting and arrow-navigation to work with the new virtualization
- moves actual filtering out of `ManagedTable` into `Searchable` component for a better separation of concerns.

Reviewed By: jknoxville

Differential Revision: D9447721

fbshipit-source-id: 15eb2eb55eed9f49a0cb1ccfb2d748b3672fa898

flow-typed/electron-menu.js

@@ -43,7 +43,7 @@ type Electron$MenuItemOptions = {
     menuItem: Electron$MenuItem,
     browserWindow: Object,
     event: Object,
-  ) => void,
+  ) => mixed,
   role?: Electron$MenuRoles,
   type?: Electron$MenuType,
   label?: string,