Nethlink: Screen sharing does not allow selecting a display or application window

[margit86]

Description

The NethLink phone island does not allow users to choose which display or application window to share. The WebRTC phone island already supports these options.

Steps to reproduce

1. Connect multiple displays to the device.
2. Open multiple application windows.
3. Open the NethLink phone island.
4. Start screen sharing.
5. Try to select a specific display or application window.

Expected behavior

The user can choose which available display or application window to share, as already possible in the WebRTC phone island.

Actual behavior

The NethLink phone island does not provide any option to select a specific display or application window.