Update settings to new format

[phunkyfish]

v21.0.3

• Update settings to new format

[phunkyfish]

Need to check option fields work correctly:

• Default recording lifetime
• Streaming method

Testbuilds: https://jenkins.kodi.tv/blue/organizations/jenkins/kodi-pvr%2Fpvr.mediaportal.tvserver/detail/PR-209/7/artifacts

[TechReefer]

Uninstalled add-on and installed and enabled this build.

Tested changing these settings:
Connection:
setting MP host address
MediaPortal:
smb user and password
free-to-air only
include Radio
import only TV Channels from group
Default recording lifetime, Days number.
Playback:
Streaming method
use RTSP streaming

All changes worked and no errors that I saw.

[phunkyfish]

I'll merge and release this PR next week. Thanks for testing @TechReefer