1. Long option
Create a pooling on whiteboard for Windows, options with long contents can not be shown correctly.

2. Disable GPU acceleration
If a widget shows blank, please turn off GPU acceleration.

3. 2 cameras on chromebook
External camera connected to Chromebook with old version ChromeOS may not be read correctly using MVBA.

4. [Manager] "stop broadcast"
Reproduce step:
1. Broadcast using manager
2. "Stop broadcast" can be grayed out.
3. Refresh can solve the issue.