In "Inbox", only move podcasts do "Downloaded" when finished

### Checklist

- [X] I have used the search function for [open](https://github.com/AntennaPod/AntennaPod/issues) **and** [closed](https://github.com/AntennaPod/AntennaPod/issues?q=is%3Aissue+is%3Aclosed) issues to see if someone else has already submitted the same feature request.
- [X] I will describe the problem with as much detail as possible.
- [X] This request contains only one single feature, **not** a list of multiple (related) features.

### App version

3.1.1

### Where did you get the app from

F-Droid

### Problem you may be having, or feature you want

Currently when in the inbox and clicking on the download button for a podcast, it disappears immediately and "jumps" to the "Downloads" section.

But it is not downloaded yet.

### Suggested solution

I think it would make way more sense to have it stay in the "Inbox" and then after finishing the download disappearing from there.

Alternatives: the notification also shows the progress.

### Screenshots / Drawings / Technical details

This is just a small visual issue, the app is great and very stable!