UX for Peertube server selection

[pizzapim]

Checklist

• I am able to reproduce the bug with the latest version.
• 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 have taken the time to fill in all the required details. I understand that the bug report will be dismissed otherwise.
• This issue contains only one bug.
• I have read and understood the contribution guidelines.

Affected version

0.24.1

Steps to reproduce the bug

1. Open the sidebar
2. Open the video provider selector
3. Press the Peertube button that by default says "FramaTube"

Expected behavior

I expected the selected server to become "FramaTube" (as seen underneath the NewPipe logo).

Actual behavior

The selected server became "PeerTube" instead.

Screenshots/Screen recordings

No response

Logs

No response

Affected Android/Custom ROM version

No response

Affected device model

No response

Additional information

I think it would be better to make the selected server indicator underneath the NewPipe logo reflect the option you press. So if you press "FramaTube" it should say that there as well. I also think it would be better to make the item in the server selector say "PeerTube" and then force the user to choose a server from a dropdown for example.

[opusforlife2]

Related: #8013.