[Feature Request] Manual subscription refresh should happen in the background

[KnightRadiant13]

Checklist

• I made sure that there are no existing issues - open or closed - which I could contribute my information to.
• I have read the FAQ and my problem isn't listed.
• I'm aware that this is a request for NewPipe itself and that requests for adding a new service need to be made at NewPipeExtractor.
• I have taken the time to fill in all the required details. I understand that the feature request will be dismissed otherwise.
• This issue contains only one feature request.
• I have read and understood the contribution guidelines.
• I have read and understood the AI policy. The content of this request is not generated by AI.

Feature description

Manually refreshing subscriptions should happen in the background so that I can still see the previously refreshed subscriptions while refreshing is ongoing

Why do you want this feature?

I don't do automatic refresh of subscriptions. When I manually refresh, the subscription page shows refreshing and hides the list of videos from the previous refresh. Since I have a large number of subscriptions, it takes considerable time to complete refresh. During this time, I am unable to access the subscribed video list.

Additional information

No response