NethVoice CTI: Recording messages from Lines does not work with Desktop Phone

[tonyco97]

Description:
When using a Desktop Phone as the primary device, recording messages does not work from:

- Settings → Voicemail

Steps to reproduce:

1. Set the Desktop Phone as the main device.
2. Start a recording from either Voicemail configuration.
3. The Phone Island correctly starts in manual click2call mode.
4. After answering, the recording starts, preceded by the beep.
5. When the call ends, the interface does not allow saving the file, and the timer keeps running, showing the recording screen indefinitely.

Expected behavior:
The system should allow saving the recorded file after hanging up, just as it does when using the Webphone.

Actual behavior:

• The timer keeps counting.
• The interface remains stuck on the recording screen.
• Saving the recording is not possible.

Notes:

• The issue occurs only with Desktop Phone.
• With webrtc extension, the recording process works as expected.

[tonyco97]

Testing release: https://github.com/nethesis/ns8-nethvoice/releases/tag/1.5.2-testing.5

[tonyco97]

Test case:
Make sure the bug is not reproducible