Screen sharing of entire screen black (TokBox_React example)

[Sara64]

New issue checklist

• I have read all of the README
• I have searched existing issues and this is not a duplicate.

General information

• Library version(s): Latest
• iOS/Android/Browser version(s): Chrome(68.0.3440.106 (Official Build) (64-bit))/Firefox(61.0.2 (64-Bit))
• Devices/Simulators/Machine affected: Windows
• Reproducible in the demo project?: Yes

Bug report

Expected behavior

Should be able to share entire screen, not just specific window or browser tab

Actual behavior

Only sharing of specific window screens and browser tabs (some of them are just black)

Steps to reproduce

set config, in react version, build react app (deploy over HTTPS to allow screen sharing)

Repo

https://github.com/Sara64/iadl

In App.js in otCoreOptions.screenSharing are options which I think should work for sharing entire screen, but it doesn't.

Thank you :)