Support podcast download setting in sync

[ksmaze]

Is your feature request related to a problem? Please describe.

• Currently can only download podcast when in audio layout.
• probably bug: Sync Action with manual selecting "Download podcast" still won't download the podcast

Describe the solution you'd like

• Add "Download podcast at sync" in Feed Settings, and actually download it when enabled

Describe alternatives you've considered

• Or make the existing Sync Action working with download podcast

Additional context
No download podcast settings here:

This action is not working:

[seazon]

will consider it